IR waveplate

standard specs,

Wavefront L/8@633nm,

SQ 40/20,

retardation tolerance L/300,

parallelism <1",

coating R<0.5%@ center wavelength,

standard wavelength

L/2   L/4:   3500nm,  4000nm- 4500nm,5500nm,6500nm ,7000nm

regards true zero order waveplate of quarter waveplate,the thickness is too thin, We always offer as per one order waveplate, more