True Zero Order Laser Lines Mica Waveplates

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.

SPECIFICATIONS

Standard Types, please inquire for special specifications

Retarder Material	Muscovite Mica
Substrate Material	N-BK7
Transmitted Wavefront	<1 Lambda @ 633 nm for diam. ≤ 25.0 mm
Retardation Tolerance	λ/50 for 532 nm type (λ/40 - λ/300 depending on design wavelength)
Homogeneity of Retardation	λ/200
Thickness	2.5 mm +/-0.25 mm
Clear Aperture	≥ 85% of central diameter
Parallelism	<3 arc minutes
Surface Quality	≤ 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	negligible
Standard Retardations	λ/4, λ/2