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Circular Polarizer
These Circular Polarizers are based on a liquid crystal polymer design. They consist of a linear polarizing film and a polymer quarter-wave film, each laminated onto an N-BK7 window. The two laminated substrates are then epoxied together with an optical adhesive, with the quarter-wave film's fast axis oriented at 45° with respect to the polarizing film's transmission axis. A broadband AR coating is deposited on each glass-to-air interface.
Component Specifications
| Outer Dimension | Available in 25.4, 30.0, 32.0 mm (± 0.20 mm) |
| Polarizer Range | 400nm – 700nm |
| Contrast Ratio | 1000:1 min depending on wavelength |
| Handedness | Left or Right (as per request) |
| Adhesive (PSA) | Yes, non PSA option available |
| Temperature Range | -20° C to 80° C |
| Damage Threshold | 1 W/cm squared, CW 0.2 J/cm squared with 20 nsec pulse, visible |
| Color | Neutral Gray |
| Substrate | Plastic Type, “Cellulose Triacetate”, dichroic |
| Surface Quality | 80/50 Scratch – Dig |
| Transmitted Wavelength Distortion | Lambda/2 measured @ 632nm |
| Thickness | 4.25mm |
| Substrates | BK-7, OEM options available |
| Surface Quality | 40/20 Scratch-Dig |
| Beam Deviation | 2 arc minutes |
| Anti Reflection Coatings | R ≤ 0.65% / surface, average. 400nm-900nm |
| Environmental Tolerance | -10˚ C to 50˚ C |
| Part | Description | *Price | Availability |
|---|---|---|---|
| CP-25 | Circular Polarizer 25.4 mm | $700 | ✓ |
| CP-30 | Circular Polarizer 30.0 mm | $800 | ✓ |
| CP-32 | Circular Polarizer 32.0 mm | $900 | ✓ |