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Right Angle Prisms

  • substrate materials: N-BK7 or UV Fused Silica
  • For light path deviation of 90° or 180° 
  • Uncoated prisms available at the current time
  • High-precision prisms with λ/10 @632.8nm flatness
  • Applications: periscopes or telescopes, binocular configurations, etc.
  • Various dimensions:  legs  3-60mm,  hypotenuse 4.24-84.85mm
Inquire for custom product  
Code Material Side Length Thickness Flatness Coating Unit Price Delivery Cart
1401-001 N-BK7 3mmx3mmx4.24mm 3mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-002 UV Fused Silica 3mmx3mmx4.24mm 3mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-003 N-BK7 5mmx5mmx7.07mm 5mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-004 UV Fused Silica 5mmx5mmx7.07mm 5mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-005 N-BK7 10mmx10mmx14.14mm 10mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-006 UV Fused Silica 10mmx10mmx14.14mm 10mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-007 N-BK7 12.5mmx12.5mmx17.68mm 12.5mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-008 UV Fused Silica 12.5mmx12.5mmx17.68mm 12.5mm λ/10@632.8mm Uncoated Inquire 4 Weeks
1401-009 N-BK7 15mmx15mmx21.21mm 15mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-010 UV Fused Silica 15mmx15mmx21.21mm 15mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-011 N-BK7 20mmx20mmx28.28mm 20mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-012 UV Fused Silica 20mmx20mmx28.28mm 20mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-013 N-BK7 25mmx25mmx35.36mm 25mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-014 UV Fused Silica 25mmx25mmx35.36mm 25mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-015 N-BK7 30mmx30mmx42.43mm 30mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-016 UV Fused Silica 30mmx30mmx42.43mm 30mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-017 N-BK7 40mmx40mmx56.57mm 40mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-018 UV Fused Silica 40mmx40mmx56.57mm 40mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-019 N-BK7 50mmx50mmx70.71mm 50mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-020 N-BK7 60mmx60mmx84.85mm 60mm λ/10@632.8nm Uncoated Inquire 4 Weeks
1401-021 UV Fused Silica 60mmx60mmx84.85mm 60mm λ/10@632.8nm Uncoated Inquire 4 Weeks

A Right-Angle Prism is a triangular block of glass with a 90-degree vertex angle and two orthogonal sides. Right-angle prisms are often used to redirect light at 90° or 180°. The deviation of the light path is done utilizing the principle of total internal reflection (TIR) at the interface of glass to air. As one selects a different entrance side to project light onto the right-angle prism, the degree to which the light path departs will also change.

If the light is incident on one perpendicular side of the right-angle prism, it undergoes a 90° redirection in the light path at the hypotenuse face and emerges at the other perpendicular side. When one needs to realize 90-degree light redirection, a right-angle prism is a much more cost-effective alternative for applications like periscopes or telescopes than a dielectric mirror with easier alignment. If the light is incident on the hypotenuse side of the right-angle prism, it experiences a 90-degree TIR when it hits the glass/air interface at the leg the first time, and then it encounters another 90° TIR when it hits the glass/air interface at the leg the second time, contributing to a 180° light redirection in total. The right-angle prism, now becoming a 180° retroflector, could be leveraged as a non-reversing mirror in binoculars, and the 180-degree deviation of the light path is not reliant on the angle at which the light enters the hypotenuse.

Right-angle prisms exhibit certain advantages when compared with other optical counterparts with similar functions. it's a great deal simpler to mount and bend from the outside than inclined mirrors in the concern of mechanical design, as well as in situations with high acoustic or inertial loads. Furthermore, the right-angle prisms can be utilized as a retroreflector, redirecting beams back in the direction that came from, as long as the acceptance angle constraints for TIR from the roof faces are not exceeded.

This page highlights Hangzhou Shalom EO's Off-the-shelf Right-Angle Prisms. Two substrate materials are available: N-BK7 or UV Fused Silica. The Dimensions are diversified, the lengths of the legs range from 3-60mm, while the length of the hypotenuse ranges from 4.24-84.85mm. Besides, these stocked right-angle prisms feature high precision with the surface flatness bridled tight to λ/10 @632.8nm. At the current time, the standard prisms in our storage are uncoated, however, you might also request custom coating options and learn the relevant details in our Custom Right Angle Prism catalog. 

Shalom EO is an industrial-leading team with professional knowledge in the domain of optics and lasers, through stringent control of qualities and tolerances, and high-precision polishing techniques, Shalom EO's right angle prisms present minimized wavefront distortion, scattering, and other undesirable diffraction effects.

Application Notes:

1.  Figure 1 shows the light path undergoes a 90-degree deviation when it projects on the hypotenuse.

 

2. Figure 2 shows the light path undergoes a 180-degree deviation when it projects on one of the orthogonal legs.

Specifications:

MaterialN-BK7 or UV Fused SilicaDimension Tolerance±0.1mm
Surface Quality40/20 S/DClear Aperture>90%
Surface Flatnessλ/10@632.8nmAngular Tolerance±3 arc minutes
Bevelling0.2x45°CoatingUncoated or Custom
30mm, Uncoated, λ/10, N-BK7 Right Angle Prism

30mm, Uncoated, λ/10, N-BK7 Right Angle Prism

3mm, Uncoated, λ/10, UV Fused Silica Right Angle Prism

3mm, Uncoated, λ/10, UV Fused Silica Right Angle Prism

20mm, Uncoated, λ/10, UV Fused Silica Right Angle Prism

20mm, Uncoated, λ/10, UV Fused Silica Right Angle Prism