| Dove
Prisms |
|
These
prisms have an interesting property If looked through the prism
and rotated about its longitudinal axis, the image rotates through
an angle twice as much as that of prism. |
|
| |
| |
| Specifications
|
|
| Material
|
BK-7 |
| Tolerance
|
|
| dimensions
|
±0.2mm |
| angle
|
±3
arc mins |
| pyramid
|
±5
arc mins |
| Surface
finish |
|
| quality
|
60/40 |
| flatness
|
 /2
|
| Coating
|
Entrance
and exit surface may be provided with AR coating if desired. |
| |
|
|
Size(mm)
|
Product
No. |
| A |
B |
C |
D |
|
| 10.00 |
42.25 |
10.00 |
14.15 |
75237 |
| 18.00 |
76.00 |
18.00 |
25.45 |
75238 |
| 25.00 |
105.70 |
25.00 |
35.40 |
75239 |
|
|
|
|
|
|
|
| |
|
| 45°
REFLECTION 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
|
+0.2mm |
| angle:
|
+ 5 arc mins. |
| Surface
|
|
| quality
|
60/40 |
| flatness
|
/2
|
| Coating
|
Larger reflecting face 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 |
|
| 19.00 |
19.00 |
32.50 |
75242 |
| 40.00 |
25.00 |
43.00 |
75243 |
|
|
|
|
|
|
| 30°
-60° -90° Littrow Dispersion/reflection Prisms |
|
These
prisms have 30° -60° and 90° angles and, when uncoated,are used
to disperse white light into spectrum . These are also used
to reflect the beam by 60° angle without inverting or reverting
the image when the larger surface is coated. |
|
| |
| |
| Specifications
|
|
| Material
|
BK-7 |
| Tolerance
|
|
| dimensions
|
+0.2mm |
| angle
|
+ 5 arc mins. |
| Surface
finish |
|
| quality
|
60/40
|
| flatness
|
/2
|
| Uncoated
|
Used to disperse white light into its spectrum. |
| Coating
|
Surface ‘B’ is coated with AlSiO and protected with black
paint. It diverts the beam by 60° angle without inverting
or reverting the image. |
|
|
|
Size(mm)
|
Product
No.
|
| A |
B |
C |
Ucoated |
coated |
| 12.70 |
21.90 |
12.70 |
75292 |
75301 |
| 22.00 |
37.90 |
22.00 |
75293 |
75304 |
|
|
| |
|
| |
|
