OFR Retarders

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ZERO-ORDER RETARDERS, Crystalline quartz
These are air-spaced, double plate Retarders. All surfaces are AR coated. These are no more nor less accurate than the multiple-order type under ordinary laboratory conditions. However, these have wider bandwidth and less sensitivity to temperature change than the multiple-order type. Aperture is 15 mm in 1" cell with scribed line indicating slow axis. These Retardation Plates are within the "zeroeth" order of retardance, that is between (0λ-1λ).

Specifications
Aperture:	Clear aperture 15mm mounted in 1" OD cell
Substrate Material	Crystal quartz
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

Quarter-wave Retarders

Catalog Number & Wavelegth	Bandwidth	Field of View	Temp. Stability (Df/°C)
RZ-¼-193	± 1.9 nm	± 0.4°	0.00013
RZ-¼-213	± 2.1 nm	± 0.5°	0.00014
RZ-¼-248	± 2.5 nm	± 0.6°	0.00018
RZ-¼-266	± 2.6 nm	± 0.6°	0.00022
RZ-¼-308	± 3.1 nm	± 0.6°	0.00026
RZ-¼-325	± 3.2 nm	± 0.7°	0.00029
RZ-¼-351	± 3.5 nm	± 0.7°	0.00029
RZ-¼-442	± 4.4 nm	± 0.8°	0.00029
RZ-¼-488	± 4.8 nm	± 0.8°	0.00029
RZ-¼-514	± 5.1 nm	± 0.9°	0.00029
RZ-¼-532	± 5.3 nm	± 0.9°	0.0003
RZ-¼-633	± 6.3 nm	± 1.0°	0.0003
RZ-¼-670	± 6.6 nm	± 1.0°	0.0003
RZ-¼-780	± 7.7 nm	± 1.1°	0.00031
RZ-¼-830	± 8.2 nm	± 1.1°	0.00031
RZ-¼-852	± 8.4 nm	± 1.1°	0.00031
RZ-¼-980	± 9.7 nm	± 1.2°	0.00032
RZ-¼-1053	± 10.4 nm	± 1.3°	0.00032
RZ-¼-1064	± 10.5 nm	± 1.3°	0.00032
RZ-¼-1310	± 13.0 nm	± 1.5°	0.00033
RZ-¼-1480	± 14.7 nm	± 1.6°	0.00033
RZ-¼-1550	± 15.4 nm	± 1.6°	0.00034
RZ-¼-1560	± 15.4 nm	± 1.6°	0.00034
*Value assumes a tolerable phase retardation error of 1% MANY MORE WAVELENGTHS IN STOCK. IF NOT, WE’LL MAKE IT.

Half-wave Retarders

Catalog Number & Wavelegth	Bandwidth	Field of View	Temp. Stability (Df/°C)
RZ-½-193	± 1.9 nm	± 0.6°	0.00028
RZ-½-213	± 2.1 nm	± 0.7°	0.00029
RZ-½-248	± 2.5 nm	± 0.8°	0.00034
RZ-½-266	± 2.6 nm	± 0.8°	0.00042
RZ-½-308	± 3.1 nm	± 0.9°	0.00051
RZ-½-325	± 3.2 nm	± 0.9°	0.00058
RZ-½-351	± 3.5 nm	± 1.0°	0.00058
RZ-½-442	± 4.4 nm	± 1.1°	0.00059
RZ-½-488	± 4.8 nm	± 1.2°	0.0006
RZ-½-514	± 5.1 nm	± 1.2°	0.00061
RZ-½-532	± 5.3 nm	± 1.3°	0.00062
RZ-½-633	± 6.3 nm	± 1.4°	0.00062
RZ-½-670	± 6.6 nm	± 1.4°	0.00062
RZ-½-780	± 7.7 nm	± 1.6°	0.00062
RZ-½-830	± 8.2 nm	± 1.6°	0.00063
RZ-½-852	± 8.4 nm	± 1.7°	0.00063
RZ-½-980	± 9.7 nm	± 1.8°	0.00063
RZ-½-1053	± 10.4 nm	± 1.8°	0.00064
RZ-½-1064	± 10.5 nm	± 1.9°	0.00064
RZ-½-1310	± 13.0 nm	± 2.1°	0.00064
RZ-½-1480	± 14.7 nm	± 2.2°	0.00065
RZ-½-1550	± 15.4 nm	± 2.3°	0.00065
RZ-½-1560	± 15.4 nm	± 2.3°	0.00065
*Value assumes a tolerable phase retardation error of 1% MANY MORE WAVELENGTHS IN STOCK. IF NOT, WE’LL MAKE IT.

MICA RETARDERS
OFR manufactures and stocks ¼-wave and ½-wave retarders in common laser wavelengths, cemented between protective glass cover plates. We do not AR coat mica retarders, as internal transmittance is ~85%. However, mica retarders are very high quality plates, with uniform retardance across the aperture, and wavefront distortion <¼-wave. Because of the natural absorption of mica, insertion losses become quite high with increasing wavelength (the plate becomes thicker). Thus, for practicality, we do not recommend mica retarders beyond ~850 nm. Mica Retarders are guaranteed to be accurate within 1% of peak value.

Material	Mica between glass
Retardance	± 1%
Parallel	2 minutes

λ/4 Wave* Catalog Number	λ/2 Wave* Catalog Number	Wavelength	Bandwidth	FOV	Temperature Stability
RA-¼-488	RA-½-488	488 nm	± 6 nm	> ± 2°	< 0.1 nm/°C
RA-¼-514	RA-½-514	514 nm	± 6 nm	> ± 2°	< 0.1 nm/°C
RA-¼-633	RA-½-633	633 nm	± 6 nm	> ± 2°	< 0.1 nm/°C
RA-¼-670	RA-½-670	670 nm	± 6 nm	> ± 2°	< 0.1 nm/°C
RA-¼-780	RA-½-780	780 nm	± 6 nm	> ± 2°	< 0.1 nm/°C
*Value assumes a tolerable phase retardation error of 1%

Optics for Research · Ph 973-579-7227 · Fax 973-300-3600 · Email: info@ofr.com