copyright slp uk ltd 2013. led sources are a unique source of glare. the diagram displays the most...
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Copyright SLP UK Ltd 2013
Nanoprism
A Breakthrough in Optical Control
What is Nanoprism??
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• LED sources are a unique source of glare.
• The Diagram displays the most common fluorescent lighting source.
Glare
SLP UK Nanoprism Complete Control of LEDs
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SLP UK Nanoprism Complete Control of LEDs
Glare
• This diagram displays a typical LED light source.
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LEDs are nearly 600 times brighter than T5 lamps
18 W T8
14 W T5
Single LED Chip
Luminous area m2
0.046 0.027 0.00004
Lumen output 1450 1200 100
Surface Brightness Cd/m2
10,000 15,000 8,300,000
Glare
SLP UK Nanoprism Complete Control of LEDs
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T8 P12 Type prismaticPrism size Circa 5mmEasily extruded15,000 prisms onA 2 ft. panel
T5 P42 Type MicroprismPrism size less than 2mmPractical limit for extrusion750,000 prisms on a 2 ft. panel
LED NanoprismPrism size 0.5 mmInjection moulded1,500,000 prisms on a 2 ft. panel
Glare Control Solutions
SLP UK Nanoprism Complete Control of LEDs
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Nanoprism
Benefits of Nanoprism
Microprism
Complete Control of LED Brightness The LED Disappear
SLP UK Nanoprism Complete Control of LEDs
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• Unique 2 surface design
• Nanoprism outer surface is a custom design moulded prism
• The rear surface is a special texture which acts in conjunction with the prisms
Benefits of Nanoprism
SLP UK Nanoprism Complete Control of LEDs
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• High Efficiency• Rear surface texture minimises reflection• Rear surface texture maximises collection of “off axis” light rays• Injection moulded sharp minimum radius front Nanoprism maximisetransmission• Injection moulded flat faces to Nanoprism ensure minimum reflection• Precise relation between rear texture and front prisms minimises losses
Transmission over 89%!!!
Benefits of Nanoprism
SLP UK Nanoprism Complete Control of LEDs
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measured under practical conditions as the difference in Lumen output between a practical luminaire without the panel and the same luminaire with the panel added
Precise Photometric control
Typical polar curve 600 x 600 RecessedModule 2200 lumen output
Benefits of Nanoprism
SLP UK Nanoprism Complete Control of LEDs
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Nanoprism vs. Opal Same Scale
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Elevationangle
70% Opalcd/kLm
Nanocd/kLm
Nano% lower
60 97.5 95.0 2.5
65 82.1 71.0 13.6
70 65.8 50.8 22.8
75 49.1 34.1 30.6
80 33.2 20.5 38.2
85 16.3 8.6 46.9
Meeting Luminance
Requirements
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10000 11000 12000 13000 14000 15000 16000 17000 18000 19000 200002000
2500
3000
3500
4000
4500
Nanoprism limiting luminance
Series1
Source Lumens/m2
Lum
inance c
d/m
2
From the graph above we can see that the limit for meeting 3000cd/m2 is 14200 Lumens per m2 input from the source. For a luminous area of 585 x585 mm this equates to 4800 Lumens input.
Nanoprism Practical application
To obscure source D ≥ S. In practice D minimum should not be less than 25 mm
Provided these guidelines are used the resultant photometry will be as publishedand the LED point sources will not be individually visible
SLP UK Nanoprism Complete Control of LEDs
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The Effects - Office
1000
750
500
300
200
Illuminance [lx]
SLP UK Nanoprism Complete Control of LEDs
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The Effects - OfficeGeneralCalculation algorithm used Average indirect fractionHeight of evaluation surface 0.75 mHeight of luminaire plane 2.73 mMaintenance factor 0.85Light flux factor (see maintenance plan) 1.00Total luminous flux of all lamps 110000 lmTotal power 1000.0 WTotal power per area (144.00 m²) 6.94 W/m² (1.33 W/m²/100lx)
Evaluation area 1 Reference plane 1.1
HorizontalEm 522 lxEmin 451 lxEmin/ Eav (Uo) 0.86UGR (7.9H 7.9H) <=19.3Position 0.75 m
SLP UK Nanoprism Complete Control of LEDs
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1000
750
500
300
200
Illuminance [lx]
SLP UK Nanoprism Complete Control of LEDs
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The Effects - Retail
The Effects - Retail GeneralCalculation algorithm used Average indirect fractionHeight of evaluation surface 0.75 mHeight of luminaire plane 6.00 mMaintenance factor 0.80Light flux factor (see maintenance plan) 1.00Total luminous flux of all lamps 125000 lmTotal power 1425.0 WTotal power per area (144.00 m²) 9.90 W/m² (1.83 W/m²/100lx)
Evaluation area 1 Reference plane 1.1
HorizontalEm 541 lxEmin 385 lxEmin/ Eav (Uo) 0.71UGR (2.5H 2.5H) <=18.3Position 0.75 m
SLP UK Nanoprism Complete Control of LEDs
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SLP UK Nanoprism Complete Control of LEDs
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The Effects – Potential Cost Savings • High efficiency means less luminaires needed
• High efficiency means lower power LEDs for the same effect
• Reduces CO2 emissions
• Harnesses the long life of LED technology to reduce maintenance and environmental impact
• 620 x 620 mm Flat sheet.• Can be cut to fit surface and recessed
modules for retail and commercial luminaires.
• Other sizes of flat sheet available.• Nanoprism can be custom moulded onto
new diffusers to control any LED Product.
Products
Application• Moulded bulkhead diffusers• Linear modules• Decorative bulkheads• Floodlights
SLP UK Nanoprism Complete Control of LEDs
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Thank YouAny Questions?
SLP UK Nanoprism Complete Control of LEDs
Copyright SLP UK Ltd 2013