S & R Optic GmbH
Enabling Crystal Optics Solutions

True Zero Order Broadband Mica Waveplates

Broadband mica waveplates are designed primarily for use in low power broadband or multi line applications when limited retardation accuracy is not an issue, but where low price is of highest importance. These waveplates are available in a wide range of standard diameters.  

Visible broadband mica retarders are centered at 550 nm and effective at the range from 400 – 700 nm. Near Infrared mica retarders are centered at 850 nm and effective at the range from 700 – 1100 nm.

Ring mount options and AR coatings for enhanced transmission are available upon request.

Each Mica sheet is sandwiched between protective glass flats for stability and easy handling.  

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 

Retarder Material

Muscovite Mica  

Substrate Material

N-BK7  

Transmitted Wavefront:

<1 Lambda at 633 nm for diameters ≤ 25.4 mm

Clear Aperture:

>85% of central diameter

Surface Quality  

40-20 scratch dig

Diameter D Tolerance:

+0/-0.25 mm

Retardation Tolerance:
(over complete wavelength range)

λ/10 for 550 nm types
λ/20 for 850 nm types

Thickness t Tolerance:

+/- 0.25 mm

Damage Threshold (uncoated):

0.7 J cm², 11 ns, 100 Hz @ 1064 nm  

Temperature Coefficient of Retardation per °C

negligible  



Outline Drawing
Permanent indicator dots on the edge mark the direction of the slow axis.

Ordering Information
Standard Size
: 20.0 mm diameter      

 

Part Number

Wavelength Range

Center Wavelength

Retardation
(at Center Wavelength)

Diameter

Thickness t

 

nm

nm

 

mm

mm

MA0100455

400-700

550

λ/4

10.0

2.5

MA0200455

400-700

550

λ/4

20.0

2.5

MA0250455

400-700

550

λ/4

25.0

2.5

MA0254455

400-700

550

λ/4

25.4

2.5

MA0500455

400-700

550

λ/4

50.0

3.5

MA0100255

400-700

550

λ/2

10.0

2.5

MA0200255

400-700

550

λ/2

20.0

2.5

MA0250255

400-700

550

λ/2

25.0

2.5

MA0254255

400-700

550

λ/2

25.4

2.5

MA0500255

400-700

550

λ/2

50.0

3.5

MA0100485

700-1100

850

λ/4

10.0

2.5

MA0200485

700-1100

850

λ/4

20.0

2.5

MA0100285

700-1100

850

λ/2

10.0

2.5

MA0200285

700-1100

850

λ/2

20.0

2.5

Part Number: MAxxxxyzz
xxxx Diameter in multiples of 0.1 mm
y Retardation: 4= λ/4, 2= λ/2
zz Center wavelength in multiples of 10 nm

Please inquire for other wavelengths, diameters and special retardation tolerance.

Ring Mounts, Black Anodized

Metric: Ø 25.0mm +/-0.1, CA = 18.0 mm
Imperial: Ø 25.4mm +/-0.1, CA = 18.0 mm