True Zero Order Laser Lines Mica Waveplates

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

405

 488

 532

 560

 633

 650

442

448

515

543

589

670

780

830

850

904

1064

1300

1510

1550