S & R Optic GmbH
Enabling Crystal Optics Solutions

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



Outline Drawing

Indicator dots are marked on the front surface to identify crystal optical axis.

 

Standard Wavelengths (nm)

405

 488

 532

 560

 633

 650







525 for broadband use at 450 nm – 650 nm

Special Wavelengths (nm) *) 

442

448

515

543

589

670

780








830

850

904

1064

1300

1510

1550








*) 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