True Zero Order Waveplate--Cemented This type of zero order waveplate is constructed of one true zero order waveplate and one BK7/K9 substrate.As the waveplate is very thin and easy to be damaged, the BK7 plate’s function is to strengthen the waveplate. Specifications Material: Quartz + BK7 (H-K9L) Wavelength Range: 200~2300 nm, Dimension Tolerance: +0.0, -0.1mm Surface Quality: 20 / 10Parallelism: <1 arc SecWavefront Distortion: < λ/8@633nm Retardation Tolerance: < λ/300 Clear Aperture: >90% Damage Threshold: >10 MW/cm2 AR Coating: R<0.2%@wavelength Features • Cemented by Epoxy • Thickness: 1.1±0.2mm • Wide Angle Acceptance • Broad Wavelength Bandwidth • Good Temperature Band Order Information P/N: Half P/N: Quarter Diameter(mm) WP-TZC210 WP-TZC410 10.0 WP-TZC212 WP-TZC412 12.7 WP-TZC215 WP-TZC415 15.0 WP-TZC225 WP-TZC425 25.4 WP-TZC230 WP-TZC430 30.0 Standard wavelength: 532nm, 632.8nm, 780nm, 808nm,980nm, 1064nm,1310nm, 1480nm, 1550nm,1590nm.Other wavelength available upon customer request Also, please indicate the following requirements, when you have a demand on our waveplate products 1.Wavelength 2.Quantity Need more informaiton to determine a suitable waveplate products for you? Check HERE