| We fabricate these from selected
natural and synthetic crystalline quartz, and other crystals
depending upon wavelength. All of our quartz Retarders are multilayer
antireflection coated on both sides so that transmittance exceeds
99% at the design wavelength. Precision of retardation is guaranteed
to be within ¼% of design value. Transmitted wavefront
is better than 1/10-wave across the full aperture. We calibrate
every Retarder which is shipped out. We will furnish upon request,
and at no additional charge, the calibrated value of any plate.
Aperture is 15 mm in 1" cell with scribed line indicating
slow axis. Surface quality 10/5 or better, flatness better than
1/20 wave, parallel better than 2 seconds. |
|
MULTIPLE-ORDER RETARDERS, Crystalline quartz
This is the single plate Retarder, and is no
more nor less accurate than the zero order type under ordinary laboratory
conditions. They will display more sensitivity to temperature change
than the zero-order type. These Retardation Plates are precision
polished to achieve the desired retardation at the desired wavelength.
Aperture is 15 mm.
The high dispersion of refraction index at shorter
wavelengths narrows both angular aperture and bandwidth. Thus, we
limit our multiple-order Retarders to 400 nm and longer wavelengths.
For UV excimer lasers, we recommend our more tolerant zero-order
Retarders (see next page). Both sides are AR coated.
We manufacture Retarders from 3.6 µm to 7.0
µm on a custom basis in MgF2 crystal. Please inquire.
Change in phase retardation (Df) relates to
bandwidth, field of view and temperature change, using a 1 mm thick
plate. Temperature stability describes the change in phase retardation
per °C of temperature change.
| 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 |
0.25% of design value at 20ºC |
Quarter-wave Retarders
Catalog Number
&Wavelegth |
Aperture |
Bandwidth |
Field
of View |
Temp.
Stability (Df/°C) |
| RM-¼-488 |
15 mm |
± 0.1 nm |
± 1.0° |
0.02 |
| RM-¼-514 |
15 mm |
± 0.1 nm |
± 1.0° |
0.019 |
| RM-¼-532 |
15 mm |
± 0.1 nm |
± 1.0° |
0.019 |
| RM-¼-633 |
15 mm |
± 0.1 nm |
± 1.0° |
0.018 |
| RM-¼-780 |
15 mm |
± 0.2 nm |
± 1.2° |
0.018 |
| RM-¼-980 |
15 mm |
± 0.3 nm |
± 1.4° |
0.017 |
| RM-¼-1053 |
15 mm |
± 0.4 nm |
± 1.5° |
0.017 |
| RM-¼-1064 |
15 mm |
± 0.4 nm |
± 1.5° |
0.016 |
| RM-¼-1310 |
15 mm |
± 0.5 nm |
± 1.6° |
0.016 |
| RM-¼-1480 |
15 mm |
± 0.7 nm |
± 1.8° |
0.015 |
| RM-¼-1550 |
15 mm |
± 0.7 nm |
± 1.8° |
0.015 |
| RM-¼-1560 |
15 mm |
± 0.7 nm |
± 1.8° |
0.015 |
*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 |
Aperture |
Bandwidth |
Field
of View |
Temp.
Stability (Df/°C) |
| RM-½-488 |
15 mm |
± 0.1 nm |
± 1.3° |
0.019 |
| RM-½-514 |
15 mm |
± 0.2 nm |
± 1.4° |
0.019 |
| RM-½-532 |
15 mm |
± 0.2 nm |
± 1.4° |
0.019 |
| RM-½-633 |
15 mm |
± 0.2 nm |
± 1.6° |
0.018 |
| RM-½-780 |
15 mm |
± 0.4 nm |
± 1.8° |
0.018 |
| RM-½-980 |
15 mm |
± 0.6 nm |
± 2.0° |
0.017 |
| RM-½-1053 |
15 mm |
± 0.7 nm |
± 2.1° |
0.017 |
| RM-½-1064 |
15 mm |
± 0.7 nm |
± 2.1° |
0.016 |
| RM-½-1310 |
15 mm |
± 1.0 nm |
± 2.3° |
0.016 |
| RM-½-1480 |
15 mm |
± 1.3 nm |
± 2.4° |
0.015 |
| RM-½-1550 |
15 mm |
± 1.7 nm |
± 2.7° |
0.015 |
| RM-½-1560 |
15 mm |
± 1.7 nm |
± 2.7° |
0.014 |
*Value assumes a tolerable phase
retardation error of 1%
MANY MORE WAVELENGTHS IN STOCK.
IF NOT, WE’LL MAKE IT. |
|
