an optical instrument
Post on 06-Jul-2015
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An Optical Instrument will be
presentation are ..
E y e s
C a me r a D i g i t a l
T e l e s c o p e
M i c r o s c o p e
Myopia
Someone can see the object if someone have convex lens
P = - 100/PRP : Kuat lensa (dioptri)
PR : Titik jauh (cm)
P = 100/x – 100/PP
P : Kuat lensa (dioptri)
PP: Titik dekat (cm)
x : jarak yang ingin dibaca
Astigmatism is one where rays that propagate in two perpendicular planes have different focus. Astigmatism can help with cylindrical lens
Astigma adalah dimana cahaya yang menyebarkan dalam dua bidang tegak lurus yang mempunyai fokus berbeda. Astigma bisa dibantu dengan lensa silinder
Cataract
Kamera digital adalah alat untuk membuat
gambar dari obyek untuk selanjutnya
dibiaskan melalui lensa kepada sensor CCD
(ada juga yang menggunakan sensor CMOS)
yang hasilnya kemudian direkam dalam
format digital ke dalam media simpan digital
Camera digital is instrument to make a
picture from object to deflect through lens
to sensor CCD (also able use with sensor
CMOS) that output to record in format digital
and then save in storage digital
Clasification of camera digital are :
Videos camera
o Professional camera : usually use in channel
television
o Camcorder
Silent camera
o Digital pocket camera
o Camera digital prosumer
o SLR digital (Single Lens Reflect digital)
Formula !! Teropong bintang
there are 2 lens fob >> fok
Magnification angular (perbesaran sudut) :
oWithout accommodation
d = fob + fok
o Accommodation maximum
d = fob + Sok
M = fob / fok
M = fob / Sok
• Teropong bumi
There are 3 lens objektive, ocular, inverted
Magnification angular :
o Without accommodation
d = fob + 4fp + fok
o Accommodation maximum
d = fob + 4fp + Sok
M = fob / fok
M = fob / Sok
Microscope
1. Magnification objective lens
2. Magnification ocular lens
a. Without accommodation
Sok = fok
b. Accomodation maximum
Length of microscope (d) = S’ob + Sok
to search value of Sok , used comparison
3. Quantity of magnification
Mok = Sn / fok
Mok = Sn / fok + 1
1/ fok = 1/ Sok - 1/ Sn
Mtot = Mob + Mok
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