| RIGHT
ANGLE PRISM, GLASS |
|
Right
angle prisms are used to achieve a 90° light path bend. Themage
viewed through it will be erect and reverse left to right. The
right angle prism can be used as total internal reflectors and
mirrors (by coating hypotenuse surface). Two right angle prisms
can be used as image erector.
These prisms are used to deflect a beam through 45° angle. |
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| |
| |
| Specifications
|
|
| Material
|
BK-7 |
| Tolerance
|
|
| dimensions
|
±0.2mm |
| angle
|
±3
arc mins |
| pyramid
|
±3
arc mins |
| Surface
finish |
|
| quality
|
60/40 |
| flatness
|
 /2
for surface upto 25mm side |
Coating
(Optional) |
Reflective
coating of aluminium with SiO2 protected by black paint.
Anti-reflection coating may be provided, if desired. |
| |
|
|
Size
(mm)
|
Product
No.
|
Comments
|
| A=C |
B |
|
|
| 10 |
14 |
75221 |
Append suffix ‘AL’ to product No. for reflective and ‘AR’
for anti-reflective coating and specify faces to be coated. |
| 15 |
21 |
75222 |
| 20 |
28 |
75223 |
| 25 |
35 |
75224 |
| 30 |
42 |
75225 |
|
|
|
|
| Equilateral
Dispersion Prisms |
|
| These
prisms have three equal 60° angles and are used as dispersion
device to its constituent colours. Higher the refractive index
of prism material, the greater will be the separation of wave
length. |
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| |
| |
| Specifications
|
|
| Material
|
BK7
(1.517),F2 (1.620),SF2 (1.648),SF1 (1.717) |
| |
| Tolerance
|
|
| dimensions
|
±0.2mm |
| angle
|
±5
arc mins |
| Surface
finish |
|
| quality
|
60/40
|
| flatness
|
/2
for surface up to 25mm side |
Coating
(Optional) |
Entrance
and exit surfaces may be provided with AR coating if desired.
|
|
|
|
Size(mm)
|
Product
No.
|
| A |
B |
C |
BK7 |
F2 |
SF2 |
F1 |
| 15.00 |
15.00 |
15.00 |
75251 |
75261 |
75271 |
75281 |
| 20.00 |
20.00 |
20.00 |
75252 |
75262 |
75272 |
75282 |
| 25.00 |
25.00 |
25.00 |
75253 |
75263 |
75273 |
75283 |
| 30.00 |
30.00 |
30.00 |
75254 |
75264 |
75274 |
75284 |
| 35.00 |
35.00 |
35.00 |
75255 |
75265 |
75275 |
75285 |
|
|
| |
|
| PENTA
PRISMS |
|
These prisms are five sided prisms. They reflect light rays
through an angle of 90° by reflections. They do not invert or
revert the image. The reflecting surfaces are aluminised.These
prisms also shorten the length of an instrument.
| Specifications
|
|
| Material
|
BK-7 |
| Tolerance
|
|
| dimensions
|
+0/-0.1mm |
| beam
deviation : |
90°±5
arc mins |
| Surface
|
|
| quality
|
60/40 |
| flatness
|
/2
|
| Coating
|
Reflection
Surface aluminised with SiO2 over coating and protected
by black paint. Entrance and exit surfaces may be provided
with AR coating if desired. |
| |
|
|
Size(mm)
|
Product
No. |
| A |
B |
C |
D |
|
| 10.00 |
10.00 |
10.00 |
11.95 |
75231 |
| 15.00 |
15.00 |
15.00 |
15.96 |
75232 |
| 20.00 |
20.00 |
20.00 |
21.65 |
75233 |
| 25.00 |
25.00 |
25.00 |
27.90 |
75234 |
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