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BROADBAND 1/2-WAVE RETARDERS FOR POLARIZATION ROTATION
A ½-wave retarder will rotate the plane of polarization by an amount that is twice the angle between the retarder axis (the white scribed line on the Cell) and the polarization plane. This Retarder is a combination of birefringent crystal plates, resulting in broadband phase retardation accurate within 1% across the designated spectrum. With broadband AR coatings, these Retarders transmit >98%. Mounted in standard Cell.

Specifications
Aperture: Clear aperture 15mm mounted in 1" OD cell
Substrate Material Crystal quartz & MgF2
Transmitted Wavefront λ/10 at 633nm
Surface Quality 10-5 laser quality
Diameter Tolerance + 0.00mm, - 0.25mm
Parallelism 0.5 seconds
Retardation Tolerance 0.5 % of design value at 20ºC

 

Catalog
Number
Wavelength
FOV
Temperature
Stability
RMA-½-NIR
740 - 950 nm
> ± 2°
< 0.1 nm/°C
RMA-½-TiS
780 - 1170 nm
> ± 2°
< 0.1 nm/°C
RMA-½-IR
1250 - 1650 nm
> ± 2°
< 0.1 nm/°C
*Value assumes a tolerable phase retardation error of 1%

 


FRESNEL RHOMBS
The most achromatic of all Retarders are the Fresnel Rhombs. We manufacture both ¼-wave and ½-wave models for the ultraviolet and the visible-near IR. Surface quality 10/5 or better, flatness better than 1/10 wave, parallel better than 10 seconds. MOUNTING CELLS are provided with the Fresnel Rhombs. Both cells have ¼ -20 holes for standard bench post mounting.


λ/4-wave
Catalog Number
λ/2
Catalog Number
Wavelength
FOV
Aperture
Material
RFU--UVB
RFU-½-UVB
240 - 360 nm
> ± 2°
10 mm
UV Silica
RFU--NUV
RFU-½-NUV
350 - 500 nm
> ± 2°
10 mm
UV Silica
RF--VIS
RF-½-VIS
425 - 675 nm
> ± 2°
10 mm
Glass
RF--VIR
RF-½-VIR
550 - 780 nm
> ± 2°
10 mm
Glass
RF--IR
RF-½-IR
1250 - 1560 nm
> ± 2°
10 mm
Glass
*Value assumes a tolerable phase retardation error of 1%

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