The thickness of a true zero order quartz plate is very thin, it is very easily damaged. In order to solve this problem, we can cement the thin quartz plate on a BK7 substrate to increase the strength.

Standard Thickness: 1.1±0.2mm
Epoxy Cemented
Moderate Damage Threshold
Better Temperature Bandwidth
Wide Wavelength Bandwidth
Good wavefront and parallelism
RoHS Compliant

Specifications

Material Crystal Quartz
Dimension Tolerance +0.0/-0.2mm
Wavefront Distortion λ/8@632.8nm
Retardation Tolerance λ/300
Parallelism <1 arc second
Surface Quality 20/10 scratch and dig
Clear Aperture >90% central area
Standard Wave quarter-wave(λ/4), half-wave(λ/2)
AR Coating R<0.25%@central wavelength
Damage Threshold >500mJ/cm2, 20ns, 20Hz @1064nm