Wide Field Retarder

• Company: Meadowlark Optics Inc.
• Type: Other
• Diameter / Dimension: 5mm - 50.8mm
• Applications: Astronomy, Biomedical/Medical, Communications, Industrial, Military, Scientific Research, Other
• Custom Wavelengths: 400 - 1800nm (please specify)
• Retardance Accuracy: ≤ λ/250 (normal incidence)
• Retardance Change: ≤ λ/100 (at 30°tilt)
• Wavefront Distortion: ≤ λ/2
• Surface Quality: 60 - 40 scratch‐dig
• Beam Deviation: ≤ 1 arc‐min

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 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.