Wide Field Retarder
KEY FEATURES
- Unmatched off-axis performance
- Standard and custom wavelength retarders
- Mounted and unmounted versions available
- Off-axis performance ideal for uncollimated light applications
DESCRIPTION
Meadowlark Optics now offers Wide Field Retarders, the latest innovation in near zero-order polymer retarder technology. At their design wavelength, Wide Field Retarders provide a consistent retardance value over a wide acceptance angle, out to 30° or more.
Standard quarter- and half-wave designs are available for common wavelengths in the visible to near infrared region. The graphs show the Wide Field Retarder performance as a function of incidence angle for the both half-wave and quarter-wave designs.
Read More...Meadowlark Optics now offers Wide Field Retarders, the latest innovation in near zero-order polymer retarder technology. At their design wavelength, Wide Field Retarders provide a consistent retardance value over a wide acceptance angle, out to 30° or more.
Standard quarter- and half-wave designs are available for common wavelengths in the visible to near infrared region. The graphs show the Wide Field Retarder performance as a function of incidence angle for the both half-wave and quarter-wave designs.
Multilayer broadband antireflection (BBAR) coatings are included as standard. Note that BBAR coating performance varies with incidence angle; these coatings perform best at (or near) normal incidence.
As with all Meadowlark Optics retarders, the fast axis is conveniently marked. Custom retardance values are available for wavelengths from 400-1800 nm. Please call for application assistance or to request a custom quotation.
Read Less...| Specifications - Wide Field Retarder | |
| Retarder Material | Birefringent Polymer |
| Substrate Material | N-BK7 |
| Standard Wavelengths | 532, 632.8, 670, 780, 850, 1064, and 1550 nm |
| Custom Wavelengths | 400-1800nm (specify) |
| Retardance | λ/2 and λ/4 |
| Retardance Accuracy | ≤ λ/250 at normal incidence at the center of the part |
| Retardance Change (at 30?tilt) | |
|
Half-wave Quarter-wave |
≤ λ/100 ≤ λ/200 |
| Transmitted Wavefront Distortion | ≤ λ/2 |
| Surface Quality (scratch-dig) | 60-40 |
| Beam Deviation | ≤ 1 arc-min |
| Reflectance (per surface) | |
|
At normal incidence At 30? incidence |
≤ 0.5% ≤ 1.0% |
| Operating Temperature | 0?C to 40?C |
| Ordering Information - Wide Field Retarders | |||
| Mounted | |||
|
Clear Aperture> in. [mm] |
Dimensions ± 0.005 in. [± 0.13 mm] |
Thickness in. [mm] |
Part Number |
|
|
|||
|
0.40 [10.2] |
Ø1.00 [Ø25.4] |
0.25 [6.35] |
WQM-050-λ |
|
0.70 [17.8] |
Ø1.00 [Ø25.4] |
0.35 [8.9] |
WQM-100-λ |
| Half Wave | |||
|
0.40 [10.2] |
Ø1.00 [Ø25.4] |
0.25 [6.35] |
WHM-050-λ |
|
0.70 [17.8] |
Ø1.00 [Ø25.4] |
0.35 [8.9] |
WHM-100-λ |
| Unmounted | |||
|
Clear Aperture in. [mm] |
Dimensions + 0/-0.010 [+0/-0.25mm] |
Thickness in. [mm] |
Part Number |
| Quarter Wave | |||
|
0.40 [10.2] |
Ø0.50 [Ø12.7] |
0.14 [3.6] |
WFQ-050-λ |
|
0.80 [20.3] |
Ø1.00 [Ø25.4] |
0.28 [7.1] |
WFQ-100-λ |
| Half Wave | |||
|
0.40 [10.2] |
Ø0.50 [Ø12.7] |
0.14 [3.6] |
WFH-050-λ |
|
0.80 [20.3] |
Ø1.00 [Ø25.4] |
0.28 [7.1] |
WFH-100-λ |
|
Custom sizes and retardance values are available. Please contact your Meadowlark Optics sales engineer for a custom quote. |
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