New and improved technical tools Imaging lens selector Visit
Product classification
GCL-030202 Penta Prisms
GCL-0302 Penta Prisms
A Penta prisms is a five-side prisms, featuring two important properties. Firstly, the images is neither inverted nor reversed while it is deviated by 90 degree. Secondly, it is a constant deflection device, i.e., all the transmitted rays are exactly deflected by 90 degree. Slight movement of the prisms does not affect the right deflected angle. This feature makes the prisms useful in rangefinder. It is also used in viewfinders of single reflex cameras. The reflecting surfaces are enhanced aluminum-coated with black paint overcoat for protection.
• Material: BK7, fine annealed
• Dimension Tolerance: ±0.1
• Flatness: λ/4 at reflection surface
λ/2 at transmission surface
• Surface Quality: 60-40 scratch-dig
• Clear Aperture: 90%
• Coatings: Reflecting surfaces are aluminized with black paint.
Entrance and exit surfaces are 1/4 wave MgF2 coating at 550nm for 0˚ angle of incidence.
GCL-0302 Penta Prisms
|
Part No. |
(a=b=c) |
d |
Total Deviation |
|
20 |
21.6 |
90°±3' |
|
|
30 |
32.5 |
90°±3' |
|
|
40 |
43.3 |
90°±3' |
© 2019 Daheng New Epoch Technology,Inc. 京ICP备05081235号-2
