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Right-angle prisms
As a meam turner (90 degrees deflection)
As a retro-reflector (180 degrees deflection)
Glass Perfection provide large amounts of right-angle
prisms, they are generally used to have two functions:
90 degree deflection occurs at the hypotenuse face.
Image viewed through a single right angle prism will
be erect but reversed left to right.
The retro-reflection is insensitive to rotate an axis
parallel to the roof.
Specifications:
| Diameter Tolerence: |
+0.1mm |
| Clear Aperture: |
> 80% |
| Angle Tolerence: |
< 3 Min deviation |
| Surface Flatness: |
^/4@632.8 mm |
| Surface Quality: |
20-10 to 60-40 scratch and dig |
| Bevel: |
0.25mm to 0.5mm |
Material:
BKY grade A optical glass
High purity uv grade fused silica
Coating:
Glass Perfection provides varieties of single
layer or multi layer anti reflecting coating on optical
windows.
High Precision Perpendicularity
Right-angle Prisms
Glass Perfection also provide BKY or fused silica
right-angle prism with excellent perpendicularity of
ground surface and polished surfaces. Such prisms are
useful for high precision optics application, which
requires a good ground reference flat.
Dove and Roof Prisms
Specifications:
| Material: |
BK Grade A Optical Glass |
| Diameter Tolerence: |
+0.0, - 0.2mm |
| Angle Tolerence: |
+ 3 Arc minute |
| Clear Aperture: |
> 80% |
| Flatness: |
^/2 @632.8mm per 25mm |
| Surface Quality: |
20/10 scratch and dig |
| Bevel: |
0.25mm to 0.5mm |
Wedges
Specifications
| Material: |
BK Grade A Optical Glass |
| Thickness Tolerance: |
+- 0.2mm |
| Diameter Tolerence: |
+0.0, - 0.1mm |
| Flatness: |
^/4 @632.8mm |
| Surface Quality: |
20-10 to 60-40 scratch and dig |
| Wedge Angle |
+- 1 minute |
| Bevel: |
0.25mm x 45 degree |
Penta Prisms
Penta prisms are a five-sided prism containing two
reflecting surfaces at 45 degrees to each other and
two reflecting faces perpendicular to the entering and
emerging beam.
Penta prisms have two important properties:
- the image is neither inverted nor reversed while
deviated by 90 degrees
- it is a constant deflection device, all transmitted
rays are deviated by the smae exact 90 degree.
Specifications:
| Material: |
BKY Grade A Optical Glass |
| Dimension Tolerance: |
+- 0.2mm |
| 90 Degree Deviation Tolerence: |
<30 arc seconds |
| Precision Series: |
<10 arc seconds |
| Flatness Standard Series: |
^/2@ 632.8nm |
| Reflectivity: |
R>95% per face from 630 to 680nm |
| Surface Quality: |
60-40 scratch and dig |
Beamsplitters Penta Prisms
By adding a wedge and with partial reflective coating
on surfaces S1, penta prisms can be used as beamsplitter,
transmission/reflection ratio of 20/80, 50/50 or others
for beamsplitter penta prism is available upon request.
(this doesn't seem to make sense).
Specifications:
| Material: |
BKY Grade A Optical Glass |
| Dimension Tolerance: |
+- 0.2mm |
| 90 Degree Deviation Tolerence: standard
series |
<30 arc seconds |
| Precision Series: |
<10 arc seconds |
| Flatness Standard Series: |
^/2@ 632.8nm |
| Reflectivity: |
R>85% per face from 630 to 680nm |
| Surface Quality: |
60-40 scratch and dig |
Beamsplitter ration transmission/reflection @ 630-680nm.
T/R: 20/80 +-5
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