click me!

Rochon Prism

  • Four Substrate Materials: Alpha-BBO, Calcite, YVO4, and Quartz
  • High extinction ratio 200000:1 (Alpha-BBO, YVO4); 20000:1(MgF2, Quartz)
  • Various coating options: broadband AR coatings (190-3500nm, 500-4000nm, 130-7000nm, 200-2300nm), P-coatings
  • Standardized aperture sizes including φ6mm, φ10mm, φ12.7mm, φ15mm, φ20mm available in stock
  • Separation Angle  1°, 8°, 10°, or custom
Inquire for custom product  
Code Material Wavelength Aperture Separation Angle Extinction Ratio Mount Unit Price Delivery Cart
20705-001 Alpha-BBO 190-3500nm ɸ6mm >8° <5x10-6 ɸ15x15mm $230 4 weeks
20705-002 Alpha-BBO 190-3500nm ɸ10mm >8° <5x10-6 ɸ25.4x19mm $415 2 weeks
20705-003 Alpha-BBO 190-3500nm ɸ12.7mm >8° <5x10-6 ɸ25.4x21mm $495 4 weeks
20705-004 Alpha-BBO 190-3500nm ɸ15mm >8° <5x10-6 ɸ30x23mm $660 4 weeks
20705-005 Alpha-BBO 190-3500nm ɸ20mm >8° <5x10-6 ɸ38x29mm $1460 4 weeks
20705-006 YVO4 500-4000nm ɸ6mm >10° <5x10-6 ɸ15x15mm $260 4 weeks
20705-007 YVO4 500-4000nm ɸ10mm >10° <5x10-6 ɸ25.4x19mm $400 2 weeks
20705-008 YVO4 500-4000nm ɸ12.7mm >10° <5x10-6 ɸ25.4x21mm $495 4 weeks
20705-009 YVO4 500-4000nm ɸ15mm >10° <5x10-6 ɸ30x23mm $680 4 weeks
20705-010 YVO4 500-4000nm ɸ20mm >10° <5x10-6 ɸ38x29mm $1460 4 weeks
20705-011 MgF2 130-7000nm ɸ6mm >1° <5x10-5 ɸ15x20mm $230 4 weeks
20705-012 MgF2 130-7000nm ɸ10mm >1° <5x10-5 ɸ25.4x28mm $370 2 weeks
20705-013 MgF2 130-7000nm ɸ12.7mm >1° <5x10-5 ɸ25.4x33mm $460 4 weeks
20705-014 MgF2 130-7000nm ɸ15mm >1° <5x10-5 ɸ30x38mm $615 4 weeks
20705-015 MgF2 130-7000nm ɸ20mm >1° <5x10-5 ɸ38x48mm $1260 4 weeks
20705-016 Quartz 200-2300nm ɸ6mm >1° <5x10-5 ɸ15x20mm $215 4 weeks
20705-017 Quartz 200-2300nm ɸ10mm >1° <5x10-5 ɸ25.4x28mm $340 2 weeks
20705-018 Quartz 200-2300nm ɸ12.7mm >1° <5x10-5 ɸ25.4x33mm $450 4 weeks
20705-019 Quartz 200-2300nm ɸ15mm >1° <5x10-5 ɸ30x38mm $495 4 weeks
20705-020 Quartz 200-2300nm ɸ20mm >1° <5x10-5 ɸ38x48mm $985 4 weeks

A Rochon Prism, or Rochon Polarizer is a polarizing optical element made of two wedged, constituent prisms. The orientations of the optical axes of the two prisms are perpendicular to each other (i.e. The optical axis of one of the wedges is parallel to the normal of incidence, and the optical axis of the other wedge is perpendicular to the plane of incidence.)  First, because the Rochon prism is made from birefringent crystal materials, it separates the incident light beam of spontaneous polarization into two components of orthogonal polarization: the s component (i.e. the ordinary light) and the p component (i.e. the extraordinary light). Since the optical axes of the two prisms of the Rochon polarizer are aligned in an orthogonal manner, the o light and e light will be switched in the second prism. Because the eo component hits the interface where the prisms assemble at 90°, it does not deviate. The oe light will be reflected at a certain angle, which is correlated to the refractive index of the birefringent t crystalline material, and the Wedge angle of the Rochon Polarizer.

In fact, the Rochon prisms function in a quite similar manner to the Wollaston prisms, except for the part that in the case of Rochon Prisms the ordinary light experiences no deviation.

Hangzhou Shalom EO offers a series of Off-the-Shelf and Custom Rochon Prisms, with prominent extinction ratios of 20000:1 (Alpha-BBO, YVO4) and 20000:1 (MgF2, Quartz). The two constituent prisms in each Rochon prism are combined using adhesive, with a black anodized aluminum housing mounted outside. The transmission spectrum spans from UV to MWIR. Three standard separation angles are available in stock: 1°, 8°, and 10°, whilst other separation angles and specifications could be tailored according to your needs.

Common Specifications:

Item MgF2 Alpha-BBO Quartz YVO4 
Wavelength Range 130-7000nm 190-3500nm 200-2300nm 500-4000nm
Extinction Ratio <5x10-5 <5x10-6 <5x10-5 <5x10-6
Surface Quality 20/10 S/D
Beam Deviation < 3 arc minutes
Wavefront Distortion <λ/4@633nm
Damage Threshold >200MW/cm2@1064nm, 20ns, 20Hz
Coating P Coating or AR Coating
Mount Black Anodized Aluminium
Rochon Prism, Quartz, Dia 6.0mm, >1°, 200-2300nm, with Round Mount

Rochon Prism, Quartz, Dia 6.0mm, >1°, 200-2300nm, with Round Mount

Rochon Polarizer, MgF2, Dia 20.0mm, >1°, 130-7000nm, with Round Mount

Rochon Polarizer, MgF2, Dia 20.0mm, >1°, 130-7000nm, with Round Mount

Rochon Prism, MgF2, Dia 15.0mm, >1°, 130-7000nm, with Round Mount

Rochon Prism, MgF2, Dia 15.0mm, >1°, 130-7000nm, with Round Mount