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BK7 Prism

There are many types of prism, each having a particular geometry to achieve the desired reflections necessary to perform a specific imaging task. Reflecting prisms may invert, rotate, deviate or displace a beam. Dispersing prisms produce spectral separation for spectroscopic applications or for tuning a laser output.

We provides many kinds of high precision prisms, including Penta Prism, Beamsplitter Penta Prism, Right Angle Prism, and Corner Cube. Our micro Penta Prism and Right Angle Prism are widely used in optical communication, such as optical switches. Dove Prism and Roof Prism are also available upon request.


Materials: BK 7, fine annealed Surface Flatness: 1/4
Angle: 45°, 90°± 3" or ± 30"
Clear Aperture Diameter: 90%
Surface Quality: 60-40scractch and dig

Prism Prism
Part No. Type ±° Dimension (mm)A=B=C
WCL-030104A 30 5
WCL-030104 3 5
WCL-030105 3 10
WCL-030105A 30 10
WCL-030101 3 12.7
WCL-030101A 30 12.7
WCL-030106 3 20
WCL-030106A 30 20
WCL-030102A 30 25.4
WCL-030102 3 25.4
WCL-030107A 30 30
WCL-030107 3 30
WCL-030108 3 40
WCL-030108A 30 40
WCL-030103 3 50.8
WCL-030103A 30 50.8

The Fresnel prisms and rhombs described on this page utilize the principle that when light undergoes total internal reflection, there is a relative phase change between the s and p polarization components. This effect is only weakly dependent on wavelength (Figure 1). As a result, these components are ideal for those working at either multiple distinct wavelengths or with broadband sources in the 8 to 12 µm region.

By manipulating the rhomb’s geometry, devices which produce quarter-wave, half-wave, or virtually any required retardation can be constructed. Please contact our sales representative with your design requirements.

Figure 1
Prism Prism Prism
This quarter-wave prism converts linear into circular polarization, and turns the beam path. This quarter-wave rhomb produces an output beam which is parallel, but displaced from, the input. This half-wave rhomb changes the polarization’s orientation for a linearly polarized input. The output polarization orientation is varied by rotating the rhomb around the optical axis. The output beam is parallel to, but displaced from, the input beam.