Laser lines mica waveplates are designed primarily for use in low power narrowband applications where superb retardation accuracy at one particular wavelength is of highest importance. These waveplates are available as standard components for a wide range of laser wavelengths commonly used in the industry with a standard diameter of 20 mm, uncoated or with antireflective coating, and as special components for more diameters and at any specified wavelength from 400 – 1550 nm.
Each mica sheet is sandwiched between protective glass flats for easy handling. Indicator dots are marked on the front surface to identify the crystal optical axis.
λ/4, λ/2, λ/8 and other retardation values
Standard size 20.0 mm diameter
Diameters 10.0, 25.0, 25.4 mm and custom sizes and shapes from 5 to 200 mm on request
Parallelism <10 arc seconds available
S & R Optics’ unique cleaving process, with highest grade muscovite mica, allows best transmission, purity, homogeneity and highest surface quality specifications offered in the whole industry.
Compared to all other waveplates, our true zero order mica waveplates exhibit only negligible dependence of retardation on angle of incidence or field of view.
Standard Types, please inquire for special specifications
<1 Lambda @ 633 nm for diam. ≤ 25.0 mm
λ/50 for 532 nm type
Homogeneity of Retardation
2.5 mm +/-0.25 mm
≥ 85% of central diameter
<3 arc minutes
≤ 40-20 scratch dig
Reflectivity of AR-Coated (633 nm) Surfaces at Normal Incidence
< 0.5% average over 400 nm – 700 nm
Damage Threshold, pulsed
0.7 J/cm², 11 ns, 100 Hz @ 1064 nm
Damage Threshold, cw
0.5 kw/cm² @ VIS-NIR
Temperature Coefficient of Retardation per °C
Standard Wavelengths (nm)
525 for broadband use at 450 nm – 650 nm
Special Wavelengths (nm) *)
*) standard specifications may apply only partially; please inquire
Ring Mounts, Black Anodized
Metric: Ø 25.0mm +/-0.1, CA = 18.0 mm
Imperial: Ø 25.4mm +/-0.1, CA = 18.0 mm
Please specify dimension, wavelength, retardation and retardation tolerance