Beamsplitter Penta for laser rangefinder

N-BK7 Beamsplitter Penta Prism

Pentaprism beamsplitters are constructed by gluing a precision pentaprism and a wedge prism together, using an appropriate interference coating on one of the traditional reflective surfaces. Since slight movement of the pentaprism does not affect the true right angle at which light is reflected, the deviation between transmitted and reflected light is highly controllable and does not vary by more than 10 arc seconds.

Material :
Optical glass, Fused silica, Sapphire.
Dimension :
1-250 mm
Dimension Tolerance :
+0/-0.1 mm
Surface Flatness :
λ/10@632.8 nm
Surface Quality :
10-5
Angular Accuracy :
5 Second
Coating :
Uncoated, AR, HR, Beamsplitter ect.

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Product Details

1. What are our capabilities in making Beamsplitter Penta Prism ?

Specification:

Material	BK7 grade A optical glass
Dimension (h) Tolerance	±0.1 mm
Dimension (A) Tolerance	±0.2 mm
Clear Aperture	>80%
Surface Quality	60-40 scratch and dig
90° Deviation	< 30 arc sec., up to 5 arc sec. Refer to the table
Flatness:	λ/4 @632.8 nm
Reflectivity	R>95% per face @630-680 nm
Protective Bevel	0.25 mm x 45°

2. BK7 Beamsplitter Penta Prism Standard Products:

A x h (mm)	1 min. deviation	30 sec. deviation	10 sec. deviation	5sec. deviation
A x h (mm)	Part No.	Part No.	Part No.	Part No.
7 x 6	FBP101	FBP201	FBP301	FBP401
8 x 8	FBP102	FBP202	FBP302	FBP402
10 x 10	FBP103	FBP203	FBP303	FBP403

Note: Other sizes, material and coatings are available upon request.

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