产品描述：Newport achromatic zero-order wave plates are designed to operate with a high degree of retardation accuracy over a broad wavelength range. These true zero-order wave plates are constructed using a stack of birefringent polymer films laminated between two
Superior broadband performance
Retardation maintained to ±λ/100 over the bandwidth
Less sensitive to wavelength change than achromatic quartz-MgF2wave plates
Better angular acceptance than achromatic quartz-MgF2 wave plates
Operate over a broad temperature range
Newport achromatic zero-order wave plates are designed to operate with a high degree of retardation accuracy over a broad wavelength range. These true zero-order wave plates are constructed using a stack of birefringent polymer films laminated between two high-precision N-BK7 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 quartz–MgF2 wave plates. Retardation changes by less than 1% over a ±7° incidence angle and is maintained to better than ±λ/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.
Achromatic wave plates are available in λ/4 or λ/2 retardation over four wavelength ranges throughout the visible and near infrared. The standard 25.4 mm outer diameter is convenient for mounting into Newport rotary mounts.