The 10RP42-3 Achromatic Zero-order Half Waveplate has &lambda,/2 retardation at the 840 nm center wavelength, and a ±,&lambda,/100 accuracy over the 715-1000 nm wavelength range. The standard 25.4 mm outer diameter is convenient for mounting into Newport rotary mounts. It is designed to operate with a high degree of retardation accuracy over a broad wavelength range. This 1 inch diameter true zero-order wave plate is constructed using a stack of birefringent polymer films laminated between two high-precision BK 7 windows, each with a high efficiency, broadband antireflection coating. This construction ensures excellent transmitted wavefront quality, while minimizing beam deviation and surface reflection losses. The assembly is mounted in a black anodized aluminum housing for protection and ease of mounting, with the retarder fast axis marked for alignment reference. Achromatic polymer wave plates have better angular acceptance and less sensitivity to wavelength change than achromatic quartzMgF2 wave plates. Retardation changes by less than 1% over a ±,7 incidence angle and is maintained to better than ±,&lambda,/100 over the entire bandwidth. Optical transmittance varies slightly from the precision zero-order wave plates because several polymer layers are used in each achromatic wave plate.
Технические характеристики
- Wavelength Range 715-1000 nm
- Center Wavelength 840 nm
- Retardation &lambda,/2
- Retardation Accuracy ±&lambda,/100
- Material Grade A N-BK7
- Diameter 25.4 mm
- Housing Black anodized aluminum
- Clear Aperture 10.2 mm
- Antireflection Coating Broadband, multilayer coating
- Average Reflectance
- Damage Threshold 500 W/cm2 CW
- Pulse Damage Threshold 0.3 J/cm2 with 10 nsec pulses
- Surface Quality 40-20 scratch-dig
- Acceptance Angle ± 7°
- Transmitted Beam Deviation &le,1 arc min
- Wavefront Distortion &le,&lambda,/4 at 632.8 nm over the full aperture
- Thickness 6.0 mm
- Operating Temperature Range -20 to 50°C
