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Optics

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Optical benchStable optical bench offering a convenient way of carrying out optical experiments as well as different experiments with radioactive sources. The bench is made of black-anodized aluminium and equip-ped with ruler on the side. Supplied with the following standard equipment:

– 2 sliding saddles (no. 2946.20) with Ø 10 mm hole for fixing various equipment.

– 1 sliding saddle (no. 2946.20) for optical disc.

– 2 bases with rubber pads and levelling screws (no. 2946.30).

Total length 1000 mm. Cross section 26 x 82 mm.

2946.00 Optical bench

Sliding saddleFor optical bench 2946.00. For fixing of optical equipment with max. 10 mm diameter fixing rod. Made of black-anodized aluminium with thumb screw and measuring line. Dimensions: 35 x 50 x 84 mm.

2946.10 Sliding saddle

Sliding saddle for optical discAs 2946.10 but with the hole off-centre. Needed for 2900.00 optical disc. (Also used in 5142.00 muon observatory.)

2946.20 Sliding saddle for optical disc

Base for optical benchBase with rubber pads and two levelling screws, in black anodized aluminium. Length: 125 mm, Height: 50 mm, Width: 25 mm.

2946.30 Base for optical bench (single)

Extension sections for optical benchBlack-anodized extension section for the optical bench 2946.00 Equipped with a ruler. Base (2946.30) is not included.

2946.40 Section for optical bench 600 mm2946.45 Section for optical bench 1000 mm2946.46 Section for optical bench 2000 mm

Joint Link for optical benchJoint link in black-anodized aluminium with degree scale for coupling of the optical bench to the extension section.

2946.50 Joint link for optical bench

Profiled railShort section of the same profile as used in the optical bench – without ruler, base and sliding saddles. Length 370 mm.

2946.35 Profiled rail

2946.40

2946.10

2946.20

2946.50 2946.30 (x2)

2946.00

2946.352946.10

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Ground glass screenMade of Plexiglas. Height 250 mm, width 250 mm, with 10 mm fixing rod.

3055.00 Ground glass screen

White screenIn laminated plastic with white surface. Height 250 mm, width 250 mm, with 10 mm fixing rod.

3055.10 White screen

Student Reuter lampThis simple, high intensity light is very suitable for experiments with lenses, prisms and optical gratings. The light source itself is a small festoon lamp with the filament aligned with the sup-porting rod making it easy to position on an optical bench. The long, narrow filament is ideal for performing experiments with lens optics and gratings. The lamp housing is supplied with a cooling fan which keeps the housing cool enough to touch even though the lamp is rated at 15 watts of electrical power.

2800.30 Student Reuter lamp

Experiment lampThis lamp emits a bright beam of light, ideal for many types of experiments and demonstrations. Focus and filament position are easily adjusted. Provided with safety jack connectors and a Ø 10 mm mounting rod for use on an optical bench or with a laboratory stand. A 50 W halogen lamp is included.During operation the lamp housing is ventilated by means of a built-in ventilator, so the surface temperature of the housing will not exceed 60 °C.The Reuter Lamp has both a bi-pin socket for halogen lamps 12 V/50 W (item no. 4270.10) and a bayonet socket for 12 V/35 W lamps (item no. 4265.40). Length: 310 mm. Width: 76 mm. Height: 105 mm (excluding mounting rod).Power supply needed: 12 V AC/DC, minimum 3 A (35 W lamp) or 4.2 A (50 W lamp).

2800.50 Experiment lamp

Aperture holder for experiment lampHolder for apertures, colour filters, etc.The aperture holder fits the lens mount of the experiment lamp. It is rotatable and can be used for apertures or filters mounted in standard slide frames.

2800.55 Aperture holder

2800.30

2800.50

3055.00 3055.10

2800.55

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Lenses and apertures

Lenses in holderFor use with the optical bench. Lens diameter 50 mm. Mounted in rectangular plastic plate 100 x 100 mm with 10 mm stainless steel rod and printed focal length.

2950.10 Lens in holder, + 300 mm2950.20 Lens in holder, + 100 mm2950.30 Lens in holder, + 50 mm2950.40 Lens in holder, - 200 mm

5760.40 Storage block for 6 lenses

Iris diaphragmMaximum aperture 28 mm. Black 100 x 100 mm plastic screen with Ø 10 mm fixing rod.

2960.00 Iris diaphragm

Lens and slide holderA versatile holder made to fix slides max. 50 x 50 mm and Ø 50 mm lenses. Two spring loaded clips allow you to fix up to 16 mm thick len-ses and slides. Supplied with a 10 mm diameter steel rod for fixing in an optical bench etc. Overall length 170 mm.

2902.01 Lens and slide holder

Set of lenses 50 mm diameterThis set of lenses comprises 6 different lenses Ø 50 mm. The lenses can be mounted in lens and slide holder 2902.01. The set of lenses may be used for a number of optical experiments but are also specified to be particularly well suited for laser experiments. A storage box is included. The set comprises lenses with the following focal lengths:Biconvex: 50, 100, 200, 1000 mm. Biconcave: 50 and 100 mm.

2903.00 Set of lenses 50 mm diameter

Adjustable slitSlit length 42 mm, width continuously adjustable to a maxi-mum of approximately 9 mm by means of a spring loaded knurled knob. Made of black coloured brass, placed in a black-anodized aluminium square, 150 mm side length with 10 mm steel rod. The adjustable slit can be positioned verti-cally or horizontally.

3230.00 Adjustable slit

2950.10-30

5760.40

2903.00

2960.00

2950.40

2902.01

2946.10

3230.00

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Slits and filter holderDesigned to accept slits and filters etc. 50 mm square of maximum 3.5 mm thickness. Black 100 x 100 mm plastic screen with Ø 10 mm fixing rod.

2950.80 Slits and filter holder

50 x 50 mm optical componentsAll of these are mounted in glass-less slides, unless otherwise noted.

Single slits, various widthsThis aperture consists of five different slit widths for demonstrations of diffraction patterns: 0.04 – 0.08 – 0.14 – 0.20 – 0.26 mm. Size: 50 x 50 mm.

3230.10 Single slits, various widths

Double slitMounted in a slide between two glass plates. Spacing between slits 0.1 mm.

3240.10 Double slit

Triple slit Spacing between slits 7 mm, slit width 1 mm.

3010.00 Triple slit

Seven slitsSpacing between slits 5 mm, slit width 0,8 mm.

3010.05 Seven slit

Arrow apertureSlit width 1.5 mm. The slit is shaped like an arrow.

3010.10 Arrow aperture

“F” slitSlit width 1 mm. Used in optical experiments; the asymmetrical shape reveals whether the picture is horizontally or vertically inversed.

3010.20 “F” slit

Slides with circular aperture

3006.00 Slide, Ø 1 mm hole3006.10 Slide, Ø 2 mm hole3006.20 Slide, Ø 4 mm hole

Frosted GlassGlass square 50 x 50 mm made of frosted Plexiglas. Fits standard slit support. Well suited to optics experiments.

3010.50 Frosted glass

2950.80

2

3010.50

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Reflection and refractionPlane mirrorGlass mirror, back-silvered with protective coating. Rectangular 180 x 120 mm.

3040.20 Plane mirror

Mirror, concave and convexBack-silvered Ø 115 mm spherical mirrors 190 mm focal length, mounted back to back in a metal frame. The frame is mounted on a 10 mm rod, length 100 mm.

3065.00 Mirror, concave and convex

Set of mirrors, convex/concave Two mirrors, one concave and one convex. Fits holder 2902.01. Diameter 50 mm, focal length +/- 100 mm.

2903.10 Set of mirrors, convex/concave

Prism tableCircular disc Ø 62 mm mounted on Ø 10 mm rod. With adjustable spring loaded clamp to accommodate prisms from 10 to 50 mm high.

2990.00 Prism table

Prism, equilateralGlass prism with polished faces. Triangle side 34 mm, height 35 mm.2985.00 Prism, equilateral

Newton’s prismAs item 2985.00 but with triangle side length 34 mm and height 25 mm.2985.10 Newton’s prism

Glass Prism, right angleSide lengths: 40 mm and 54 mm, height: 40 mm.2985.15 Glass prism, right angle

Crown glass prismTriangle side 30 mm, height 30 mm.2985.20 Crown glass prism

Flint glass prismTriangle side 30 mm, height 30 mm.2985.30 Flint glass prism

Rectangular prism, glassFour-sided prism with polished surface for experimenting with path of rays in plan parallel objects. Dimension: 60 x 20 x 20 mm.2995.00 Rectangular prism, glass

3040.20

3065.00

2903.10

2990.00

2985.00-30

2995.00

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Prism, hollow 60°Hollow prism with 3 mm glass sides and a detachable top. Outer length 68 mm. Height 53 mm. For demonstrating refraction in liquids.

3000.00 Prism, hollow 60°

Sugar prismThe sugar prism is used for measuring the sugar concentration in liquids, e.g. juice. Using a number of reference solutions with known sugar content one can compare the refraction of light, e.g. a laser beam, of reference samples and an unknown solu-tion. Supplied with complete instructions for student projects and experiments.

5459.20 Sugar prism

Light refraction tankThis Plexiglas tank is supplied with plane parallel sides. One of the corners in the bottom is cut off at a 45° angle to facilitate the entry of light rays. It is ideal for optical experiments with refraction and (total) reflection. To make the light rays visible in the water, a small amount of chalk powder can be suspended in the liquid. If the light source is white light or a blue or violet laser like our 1420.95, a little fluorescein will give very good results. To make the rays visible in the air above the water, blow a little smoke into the tank.Size: 370 x 130 x 150 mm.

3015.00 Light refraction tank

Lid for 3015.00Needed to keep smoke inside the tank.

3015.10 Lid for 3015.00

Sodium fluoresceinWhen hit by shortwave light, fluorescein lights up with a bright yellowish hue. It is useful for showing the path of a light ray in a transparent liquid. Visible light or a blue or violet laser beam can be used. Sodium fluorescein can be supplied either as a powder or in solution.

8298.00 Sodium fluorescein, powder, 50 g8299.00 Sodium fluorescein, solution, 200 mL

Mirror, rotatable with indicator needleThis rotatable mirror is mounted on a stand. Useful for directing the light beam as desired inside the refraction vat.

3025.00 Mirror, rotatable with indicator needle

3000.00

8299.00

5459.20

3025.00

3015.00

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Geometrical opticsOptical discA 25 cm diameter white faced disc clearly marked at every 5° and with crosshairs at 90° to mark the centre. The disc can be rotated around the centre. The stand provided fits the special 2946.20 sliding saddle. The optical disc is equipped with a holder for optical components from e.g. the 2902.00 optics kit.

2900.00 Optical disc

Optics kitA complete set of 19 mm thick acrylic prisms, lenses and mirrors suitable for doing all of the classical optics experi-ments. Supplied in a partitioned storage box. All the acrylic blocks are made of clear polished acrylic resin free from striae and bubbles. Bottom surfaces are ground to show ray tracks. The kit comprises the following items which may also be supplied sepa-rately: 2905.00/20/30/40/50/60 and the mirrors 2908.00 and 2910.00.

2902.00 Optics kit

Acrylic plastic blocksFor refraction experiments. Clear 19 mm thick, polished blocks, free from striae and bubbles. Bottom surfaces are ground to show ray tracks.

No. type Dimension

2905.00 Triangular prism 90°, 45°, 80 x 56 mm.2905.10 Triangular prism Equilateral, side 64 mm.2905.20 Biconvex lens 79 mm, radius 205 mm.2905.30 Biconcave lens 79 mm, radius 205 mm.2905.40 Rectangular prism Side 75 x 25mm.2905.50 Semicircular lens 80 mm diameter.2905.60 Trapezoidal prism Total Length: 100 mm

Smoke lenses, set of 4Optics experiments will never be the same without

smoke lenses once you have tried them. Students can see the light as it passes through the lenses. Refraction and internal reflection are observed with a clarity never seen before. Especially well suited for experiments with lasers. The set comprises 4 blocks 20 mm thick made of a special acrylic resin: 2 convex lenses 50 and 100 mm focal length, 1 prism 90°, 45°, 45° and 1 rectangular prism.

2912.00 Smoke lenses, set of 4

2900.00

2902.00

2905.00

2905.40 2905.50

2905.60

2905.202905.30

2910.00

2908.00

2905.10

2912.00

2908.00 Plane mirror glass, back-silvered, mounted on a hardwood block. Side length 90 mm.2910.00 Cylindrical mirror. Made of nickel-plated brass. Side length 110 mm.

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Optical set with light box Very comprehensive set for teaching geometrical optics and mixing of colours.The set is consisting of a light box with a 12V halogen bulb, different lenses, slits, colour filters and mirrors. 24 parts.

2935.00 Optical set with light box

Candle holder on support standThis candle holder is useful in experiments with image formation using convex lenses. The stand is supplied with a moveable candle holder so that the candle can be placed at just the right height. Height: 65 mm.

2820.00 Candle holder on support stand

Candle holderThis holder is designed for candles (item no. 2810.00). The holder is supplied with a Ø 10 mm rod which fits standard laboratory support hardware. Height: 55 mm.

2820.10 Candle holder

Lamp holders E14/E27 for mains connectionMounted on a 10 mm diameter rod, supplied with cable and 230 V plug.Stand base is not included (shown with 0004.10).

4130.10 Lamp holder E274130.20 Lamp holder E14

2935.01

2935.00

2820.00

2820.104130.10

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Optics set, image formationLenses mounted in holder with surrounding black screenFor student use. 40 mm lenses mounted in rectangular plastic plate 80 x 120 mm with a heavy nickel-plated brass base. En-graved focal distance. Centre height 83 mm. Can be used with light source no. 2800.30, slits and filter holder no. 2970.00.

2965.00 Lens in holder, + 300 mm2965.10 Lens in holder, + 100 mm2965.20 Lens in holder, + 50 mm2965.30 Lens in holder, - 200 mm

Slits and filter holderDesigned to accept slits and filters etc. of size 50 mm square by a maximum of 3.5 mm thickness. 80 x 120 mm plastic screen with heavy nickel-plated brass base. Centre height 83 mm.

2970.00 Slits and filter holder

Glass platePlane rectangular 180 x 120 mm, 2 mm thick.

3040.00 Glass plate

Glass plate, frostedPlane rectangular 180 x 120 mm, 2 mm thick.

3040.10 Glass plate, frosted

Plane mirrorGlass, back-silvered with protective coating. Rectangular 180 x 120 mm.

3040.20 Plane mirror

ScreenWhite cardboard plate. Dimensions: 180 x 120 mm.

3040.30 Screen

Holder for screens and mirrorsIn polished 1 mm stainless steel. Width 20 mm, height 40 mm.

3050.00 Holder for screens and mirrors

2965.00-.30

3050.00

3040.10

3040.00-.20-.30

2970.00

3040.10

3040.20

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coloursColour filters, foilThese transparent coloured foils are supplied in rolls of 50 x 122 cm. These colour filters are reasonably selec-tive and correct compared with the international colour standards. The filters can be cut into A4 format or other appropriate sizes for use on overhead projectors or e.g. 6 x 6 cm sizes for student use.

3089.00 Colour filter, primary red3089.10 Colour filter, yellow3089.20 Colour filter, primary green3089.30 Colour filter, primary blue3089.50 Colour filter, cyan3089.60 Colour filter, magenta

Colour filters, acrylicColour filters produced with 3 mm thick, 50 x 50 mm acry-lic plates suitable for use with the aperture supports items 2950.80 and 2970.00.

3085.00 Colour filter, red3085.10 Colour filter, yellow3085.20 Colour filter, green3085.30 Colour filter, blue

Coloured filters, 10 piecesSet of coloured filters mounted in slides. Yellow, ruby, blue, red, green, cyan, magenta, purple, mat.

3090.90 Coloured filters

Colour discMade of thick cardboard, Ø 300 mm, with three sets of seven spectrum colours correctly proportioned to appear white when rapidly rotated.

3200.00 Colour disc

Whirling apparatusFor rotation of colour disc no. 3200.00. Consists of a handle with a spindle and pulley with cord for rotation of spindle. The colour disc is fixed by an 8 mm knurled nut. Length 160 mm, diameter 25 mm.

3202.00 Whirling apparatus

Motor/generatorOur universal 12 V motor is ideal for bringing the colour disc in rotation.Detailed description on page 72.

2025.00 Motor/generator

Discs with black/white patternsThe set contains two discs. They create the sensation of a colour spectrum when rotated slowly. Disc diameter: 120 mm. The discs can be used with motor/generator 2025.00.

3205.00 Discs with black/white patterns

3090.90

3089.00-.60

3200.00

3202.00

2025.00

3205.00

3085.00-.30

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spectral lampsSpectral lamps, OsramA powerful light source for producing line spectra or monochromatic light when used with the appropriate filters.Lamps with 9 pole Pico sockets with external gas glow head for visible spectral emission.Length: 100 mm. Diameter: 20 mm.For mounting inside spectral lamp housing no. 2830.50.

2835.00 Spectral lamp Na-102835.20 Spectral lamp Cd-102835.30 Spectral lamp He-102835.40 Spectral lamp Ne-102835.50 Spectral lamp Zn-102836.10 Spectral lamp Hg-100

Lamp holder for Osram spectral lampsThe well known lamp holder for Osram spectral lamps has a built-in cooling fan to keep the surface temperature below 50 °C. Must be used with the control transformer no. 2840.50. (Provided with a Ø 10 mm support rod that fits a threaded hole on the back.)Dimensions: 78 x 78 x 236 mm.

2830.50 Lamp holder for spectral lamps

Control transformerUse with our spectral lamp holders – for both Osram and E-27 types. Max. 1 A. Dimensions: Width 185, height 120, depth 220 mm.

2840.50 Control transformer (230 V)

Spectral lamps with E-27 socketA low cost alternative to using the spectral lamps from Osram. These lamps should be used with a special spectral lamp hol-der (no. 2830.60) as well as a control transformer (no. 2840.50).

2836.50 Spectral lamp with E-27 socket, Na2836.60 Spectral lamp with E-27 socket, Hg2836.70 Spectral lamp with E-27 socket, Ne

Lamp holder for E-27 spectral lampsVentilated lamp holder for E-27 spectral lamps.Must be used with control transformer 2840.50. Dimensions 78 x 78 x 295 mm

2830.60 Lamp holder for E-27 spectral lamps

2840.50

2830.50

2835.00-2836.10

2830.60

2836.50-70

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spectral tubesStraight pattern, capillary length approximately 70 mm. Fitted with a 6.5 mm diameter contact caps at each end.For observing line and band spectra from various noble and diatomic gasses.For mounting inside spectral tube holder 2855.50 (previous page).

2850.00 Spectral tube Ne2850.10 Spectral tube Hg2850.20 Spectral tube H22850.25 Spectral tube H2 Balmer2850.30 Spectral tube He2850.40 Spectral tube Ar2850.50 Spectral tube O22850.60 Spectral tube Kr2850.70 Spectral tube N22851.10 Spectral tube H2O2851.20 Spectral tube CO22851.30 Spectral tube Xe2851.50 Spectral tube I iodine *)2851.80 Spectral tube Na and He*)

*) please note:

As the elements iodine and sodium are solid at room tempe-rature, the spectral tubes 2851.50 and 2851.80 will look ”dirty” on the inside of the glass. The sodium may even have formed a cast of the electrode, making it look broken. Normally, these conditions do not affect the function of the tubes.

Spectral tube holder and power supplyThis holder makes the use of spectral tubes easier and safer. The spectral tube is mounted from the front in the insulated holders with electrodes, where the lower holder is spring loaded parallel to the tube axis.The holder is provided with a power supply which can deliver 6 kV DC at max. 2 mA to the electrodes built into the base of the insulated holder.Can be used with spectral tubes 2850.00 – 2851.30 and with many other types of spectral tubes.Dimensions: 78 x 78 x 290 mm. For 220 V AC.

2855.50 Spectral tube holder and power supply

2850.00-70 2851.10-80

2855.50

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spectroscopyPrisms (equilateral)High quality prisms suited for spectrometer no. 3215.30 to measure spectral lines as well as to determine refractive indices of prisms.Dimensions: side length 30 mm, height 30 mm

2985.20 Crown glass prism2985.30 Flint glass prism

Hand spectroscope, direct viewingThis high quality instrument gives bright and sharp spectra, centred in the field of view. The instrument is based on a 600 lines per mm grating and allows observation of both emission and absorption spectra. Overall dimensions: Diameter 25 mm, length 105 mm.

3210.05 Hand spectroscope, direct viewing

spectrometerThis classical sturdy spectrometer can be used with either a prism or an optical grating. The instrument is provided with an easy to read vernier scale that can be read directly in tenths of a degree. The spectrometer is supplied with a prism and grating holder on an adjustable prism table. The collimator and telescope are fitted with 178 mm focal length 32 mm aperture achromatic objectives. The telescope is fitted with a Ramsden eyepiece and crosshair reticle and a collimator with an adjustable slit.The telescope and collimator mounting arrangement permits accurate levelling of the axes. The spectrometer table, diameter 85 mm, is marked with lines to assist positioning of the prism in relation to the levelling screw, and it has interchangeable clamping units for prism and diffraction gratings.

3215.30 Spectrometer

2985.20-30

3210.05

3215.30

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Diffraction gratingsOptical gratings, 24 x 36 mmA grating mounted between two plane parallel plates of glass. Frame area: 50 x 50 mm. These gratings fit the filter holders 2950.80 and 2970.00.Grating area: 24 x 36 mm.

3245.00 Optical grating, 300 lines/mm3245.10 Optical grating, 600 lines/mm3245.20 Optical grating, 1200 lines/mm

Optical gratings, 30 x 45 mmA grating mounted between two plane parallel glass plates. Frame area: 48 x 63.5 mm. These gratings are ideal for the 3215.30 spectrometer. (They will not fit the 2950.80 or 2970.00 filter holders.)Grating area: 30 x 45 mm.

3250.00 Optical grating, 100 lines/mm3250.10 Optical grating, 200 lines/mm3250.20 Optical grating, 300 lines/mm3250.30 Optical grating, 600 lines/mm

Diffraction gratingA demonstration slide consisting of three gratings with 100, 300 and 600 lines/mm respectively. Each has an area of 9 x 16 mm. They are mounted between plane parallel glass plates in a cardboard slide 90 x 30 mm in size.

3260.00 Diffraction grating

Glass diffraction gratings Glass diffraction grating on a glass carrier. Grating surface approx. 25 x 25 mm. Carrier surface 38 x 50 mm, thickness 4 mm, suited for spectrometer no. 3215.30

3255.05 Diffraction grating 300 lines/mm3255.10 Diffraction grating 600 lines/mm

3245.00-20

3260.00

3250.00-30

3255.05-10

Grating model, set of 4 kitsIt can sometimes be difficult for students to visualize the optical diffraction grating. Standard gratings have very small gratings constants making the lines invisible to the naked eye. Using machine screws and 0.30 mm nylon line it is possible to produce your own simple optical grating. With a laser beam and a distance of 6 to 10 meters from the grating to a projection screen it is possible to clearly see the diffraction pattern caused by this large spacing grating. This device provides students with a clearly visible example of an operating optical grating.

3244.00 Grating model, 4 kits

3244.00

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He-Ne laser The laser emits light with a wavelength of 632.8 nanometres. The emitted light is coherent, i.e. wave fronts propagate in the same phase over a large distance compared with ordinary light sources. The emitted light is highly directional and the beam diameter at the laser is about 0.5 mm increasing very gradually at increasing distances from the laser. The light emitted is not uniformly polarized but changes its polarization at random around the direction of propagation. Light from the laser is ideal for demonstrations of optical interference. If a line grating is placed in the laser beam, the interference pattern will be clearly visible on a projection screen. The laser can be used for a wide range of applications in optics, communication etc.

2885.00 He-Ne Laser, max. 1 mW2885.10 He-Ne Laser, max. 2 mW

He-Ne laser, modulatedLike 2885.00 but with the option of amplitude modulating the light. The laser is provided with a BNC connector for connec-tion to a function generator, CD-player or similar signal source. Photodetector 4895.50 is a perfect match for demonstration of optical communication.Maximum modulation frequency: 1 MHz

2885.20 He-Ne laser, modulated, max. 1 mW

Laser objectiveNeeded when the laser beam is too narrow. Together with e.g. an F = 100 mm lens this convex lens is useful for illumination of a larger area of a diffraction grating or a slide with slits. The objective is supplied with a threaded adapter for mounting to the laser’s optics adapter.

0768.86 Objective 10x achromatic, N.A. 0.25

Laser pointersEasy to use pencil sized diode laser pointers. Runs on bat-teries. Can be used in interference experiments as well as in geometrical optics. Optical power is less than 1 mW (class II)

1420.70 Laser pointer, red (670 nm)1420.80 Laser pointer, green (532 nm)1420.95 Laser pointer, violet (405 nm)

Powerful laser pointersThese laser pointers are class IIIa and are not recommended for students.

1420.75 Laser pointer class IIIa, orange (594 nm)1420.85 Laser pointer class IIIa, blue (473 nm)

2885.00

2885.20

1420.70-80-95

1420.751420.85

0768.86

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Photodetector The photodetector is provided with a photo diode which gives off an electrical signal proportional with the light intensity. The signal can be applied to the built in loudspeaker or be used for measurements via the AC and DC output connections. The photodetector can be used for demonstrating communication over a laser beam, fibre optic communication, plotting of inter-ference patterns, etc. The maximum frequency is 1 MHz.

4895.50 Photodetector

Fibre optics SetFor demonstration of optical communication with laser and photodetector. Comprises items 2887.00, 2886.10 and 4885.51 described below.

2886.50 Fibre optics Set

Optical fibreThis flexible optical fibre guides light rays along curved paths from one place to another. It can be readily cut to the desired length. It can be used in electronics, models, data transfer projects, etc. The external diameter of the fibre with protective covering is 2.2 mm, while the optical fibre itself is 1 mm in diameter.

2887.00 Optical fibre, per meter

Optical fibre holderThis threaded adapter has a centring hole and is designed for optical fibre item no. 2887.00. The cable is secured and centred by means of an O-ring.

2886.10 Optical fibre holder

Holder for optical fibre for photo detectorFits the photo detector 4885.50 and the optical fibre 2887.00

4885.51 Holder for optical fibre for photo detector

Laser diffraction kit This kit comprises 18 slides which allow performance and de-monstration of e.g. Fraunhofer Diffraction, Fresnel Diffraction, a number of other diffraction experiments.

– Six slides with 1 to 6 slits. Width 0.06 mm, distance 0.20 mm

– Slide with holes, Diameters 0.3 – 0.4 – 0.6 – 1.0 mm– Three slides with coarse gratings– Two slides with fine diffraction gratings (80 and 300 lines per millimetre)– Slide with a fine metal gauze (300 mesh)– Slide with a tapered single slit– Slide with a tapered double slit– Two slides with polarizing filters– Slide with a transmission hologram

The slides are labelled and come in a storage box complete with an inventory list and brief experiment notes.

3272.00 Laser Diffraction kit

4895.50

2887.00

2886.104885.51

3272.00

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Ultraviolet radiation

Ultraviolet light - properties and hazardsThis equipment has been designed to illustrate the many inte-resting properties of ultraviolet light using protective film, clear film, ordinary glass and a Schott UV filter. Also useful for investigating skin protective sun cream.

the set comprises:

– UVA lamp no. 2871.00– UVA probe no. 2872.00– Accessory kit no. 2872.10 with filters and other materials

including fluorescent and phosphorescent plates.

Complete instructions included.

SAFETY NOTE: The light source is a UVA lamp emitting most UV radiation in the range 350-400 nm with a maximum around 370 nm. These wavelengths pose a minimum risk to eyes and skin, and the radiation does not generate harmful ozone.

2871.50 Ultraviolet radiation set

Additional equipment needed

2515.60 battery box

3867.50 demonstration multimeter or any digital multimeter, e.g. 3862.15.

UVA lampThis UVA lamp emits both spectral light (4 lines from the mercury spectrum) and a band of UV light in the range from 350 nm to 400 nm. The UV lamp is supplied with an ordinary power plug (for direct connection to mains power). Dimensions: 190 x 75 x 75 mm.

2871.00 UVA lamp

Zinc sulphide screenThis phosphorescent screen will ex-hibit light emission some time after is has been illuminated by ultraviolet light. The screen can thus be used to confirm that UV light is present in a light source. Can be used with UV accessory kit 2872.10, UV lamp 2871.00 and UV Probe 2872.00. Screen size: 110 x 105 mm. Mounted in a holder with a Ø 10 mm stainless steel rod. (Stand base is not provided.)

3075.00 Zinc sulphide screen

2871.50

3075.00

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Phosphorescent plateLike 3075.00 but measures 70 x 95 mm. Unmounted.

3075.10 Phosphorescent plate

Fluorescent plateThis plate exhibits fluorescence when exposed to ultraviolet light. In contrast to phosphorescent materials where visible light emission persists some time after exposure to the UV, fluorescent materials re-emit visible light only during exposure. It can be used to demonstrate this phenomenon and to show how some materials e.g. UV film in Accessory Kit 2872.10 filter out UV light. Size: 70 x 95 mm.

3076.00 Fluorescent plate

UVA sensor, directionalUseful for investigating emission from the sun, halogen lamps, solarium lamps etc. The well-defined bandwidth 370 nm +/- 5 nm is ensured by a narrow band filter.The sensor is provided with a 5-pole DIN connector and requires a +5 V DC power supply. The sensor can be con-nected to a data logger or to an ordinary voltmeter via battery box no. 2515.60.Dimensions: Ø 24 x 99 mm.

2872.00 UVA sensor, directional

UVA-accessoriesUVA accessories consisting of standard glass plate, fluore-scent plate, phosphorescent plate, UVA filter, UVA plastic film and normal plastic film.

2872.10 UVA-accessories

3076.00

2872.10

2872.00

3075.10

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Optics58

science

Polarizing filtersUnmounted. Dimensions 50 x 50 mm. Pair.

3270.00 Polarizing filters

Polarizing filterSheet of unmounted polarizing filter, A4. Can be cut with scissors.

3270.11 Polarizing filter

Apparatus for the study of light energyUsed to determine the energy efficiency of an incandescent lamp. Apart from the lamp, the container contains a resistor (with the same resistance as the lamp). The container is filled with water and the amount of energy that is converted into heat is calculated from the temperature incre-ase of the system. The part of the electric energy that doesn’t heat the water must have radiated away from the system.Dimensions: Height 120 mm, diameter 70 mm.

3207.00 Apparatus for light energy

The polarizing filters are supplied with a protective film on both sides. Remove before use.

Lux meter YF 1065This digital lux meter is a robust and handy item provided with a separate safe-sealed photodetector for maximum stability. The photodetector has good spatial response and will thus respond to illumination from all directions. An analog output signal is provided for connection a data logger. This is useful when experimenting e.g. with photosyn-thesis. Supplied complete with a battery and a convenient carrying case. Measuring ranges: 0-200 lux, 0-2000 lux, 0-20000 lux.The angular response follows the cosine response with the following deviations: 30°: < ±2%. 60°: < ±7%. 80°: < ±5%. Provided with a “hold” function for convenient measurement.Analog output: Jack connections (4 mm).Size, instrument: 119 x 64 x 26 mm.Photodetector: 125 x 66 x 36 mm.

1888.20 Lux meter YF 1065

3207.00

1888.20

3270.11

3270.00