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Dichroic Circular Polarizer
KEY FEATURES
- High isolation
- Large diameters available
- Low transmitted wavefront distortion
DESCRIPTION
Meadowlark Optics Dichroic Circular Polarizers consist of a dichroic linear polarizer and true zero-order quarterwave retarder. Precisely aligning the retarder fast axis at 45° to the linear polarization direction ensures optimum performance.
True zero-order retarders are used in the assembly of our Dichroic Circular Polarizers and tight retardance tolerances contribute to the final performance.
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Meadowlark Optics Dichroic Circular Polarizers consist of a dichroic linear polarizer and true zero-order quarterwave retarder. Precisely aligning the retarder fast axis at 45° to the linear polarization direction ensures optimum performance.
True zero-order retarders are used in the assembly of our Dichroic Circular Polarizers and tight retardance tolerances contribute to the final performance. Once aligned, both polarizer and retarder materials are laminated between optically flat substrates, providing a peak-to-valley transmitted wavefront distortion of less than λ/5. Anti-reflection coated windows ensure surface reflection losses are minimized.
Achievement of the desired polarization effect requires proper orientation of your Dichroic Circular Polarizer; be sure to position the indicator marking in the direction of beam propagation. Our standard Dichroic Circular Polarizers are designed for single wavelength applications. Achromatic versions are also available on a custom basis.
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| Specifications - Dichroic Circular Polarizer | |
| Standard Wavelengths | 532, 632.8, 670, 780, 850, 1064, and 1550 nm |
| Substrate Material | N-BK7 |
| Polarizer Material | Dichroic Polymer |
| Retarder Material | Birefringent Polymer |
| Transmitted Wavefront Distortion (P-V @ 632.8 nm) | |
|
Visible Near Infrared |
≤ λ/5 ≤ λ/2 |
| Beam Deviation | |
|
Visible Near Infrared |
≤ 1 arc-min ≤ 2 arc-min |
| Surface Quality (scratch-dig) | 40-20 |
| Reflectance (per surface) | ≤ 0.5% |
| Isolation | >99.8% |
| Storage Temperature | -20˚C to +50˚C |
| Operating Temperature | -20˚C to +50˚C |
| Laser Damage Threshold | 1 W/cm2, CW |
| Prolonged exposure to strong ultraviolet radiation may damage these polarizers. | |
| Ordering Information - Dichroic Circular Polarizer | |||
| Mounted | |||
|
Clear Aperture in. [mm] |
Thickness in. [mm] |
Diameter ± 0.005 in. [± 0.13 mm] |
Part Number |
|
0.40 [10.2] |
0.25 [6.35] |
Ø1.00 [Ø25.4] |
CPM-050-λ |
|
0.70 [17.8] |
0.35 [8.9] |
Ø1.00 [Ø25.4] |
CPM-100-λ |
|
1.20 [30.5] |
0.50 [12.7] |
Ø2.00 [Ø50.8] |
CPM-200-λ |
| Unmounted | |||
|
Clear Aperture in. [mm] |
Thickness in. [mm] |
Diameter +0/-0.010 in. [+0/-0.25 mm] |
Part Number |
|
0.40 [10.2] |
0.13 [3.3] |
Ø0.50 [Ø12.7] |
CP-050-λ |
|
0.80 [20.3] |
0.26 [6.6] |
Ø1.00 [Ø25.4] |
CP-100-λ |
|
Meadowlark Optics standard Dichroic Circular Polarizers provide left-hand circular output. Please call to request a quote for right-hand output. Append a "-RH" to your part number for right hand circular output. |
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