Polarizer Principles
Meadowlark Optics DOWNLOAD PRINCIPLES Dichroic Polarizers Meadowlark Optics offers an
Dichroic Circular Polarizer
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$655.00 – $1,810.00
Key Features
- High extinction ratios
- Excellent surface quality
- Wide angular acceptance
- Low transmitted wavefront distortion
- Ultraviolet, visible, near infrared wavelengths
Circular polarizers transmit either left-circular polarized light or right-circular polarized light for an input beam of any polarization state. When circularly polarized light is reflected, it’s propagation direction reverses, changing left-circular polarization to right circular polarization and vice-versa. Therefore, the same polarizer that produces circular polarization of the incident beam will block the return beam.
Achievement of optical isolation using the circular polarizer requires that the reflection be specular and that no significant depolarization or polarization modification occur in any intervening medium between the reflector and optical isolator. We offer circular polarizers in two basic designs, each for use in air:
Dichroic Polarizer / Zero-Order Retarder
Beamsplitting Polarizer / Zero-Order RetarderCommon Specifications
Substrate Material: N‐BK7
Polarizer Material: Dichroic Polymer
Retarder Material: Birefringent Polymer
Transmitted Wavefront Distortion (P‐V @ 632.8 nm):
Visible ≤ λ/5, Near Infrared ≤ λ/2
Beam Deviation: Visible ≤ 1 arc‐min, Near Infrared ≤ 2 arc‐min
Surface Quality: 40 – 20 scratch‐dig
Reflectance (per surface): ≤ 0.5 %
Isolation: > 99.8 %
Storage Temperature: ‐ 20 ˚C to + 50 ˚C
Operating Temperature: ‐ 20 ˚C to + 50 ˚C
Laser Damage Threshold: 1 W/cm², CW
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Item # | Mount | Size | Wavelength | Clear Aperture | Thickness | Lead Time | Price | Quantity | Add to cart |
|---|---|---|---|---|---|---|---|---|---|
CPM-050-0670 | Mounted | 0.500 in. (12.70 mm) | 670 | 0.400 in. (10.16 mm) | 0.250 in. (6.35 mm) | 1 - 2 Days | $748.00 | ||
CPM-050-0780 | Mounted | 0.500 in. (12.70 mm) | 780 | 0.400 in. (10.16 mm) | 0.250 in. (6.35 mm) | 1 - 2 Days | $748.00 | ||
CPM-050-0850 | Mounted | 0.500 in. (12.70 mm) | 850 | 0.400 in. (10.16 mm) | 0.250 in. (6.35 mm) | 1 - 2 Days | $748.00 | ||
CPM-050-1064 | Mounted | 0.500 in. (12.70 mm) | 1064 | 0.400 in. (10.16 mm) | 0.250 in. (6.35 mm) | 1 - 2 Days | $748.00 | ||
CPM-050-1550 | Mounted | 0.500 in. (12.70 mm) | 1550 | 0.400 in. (10.16 mm) | 0.250 in. (6.35 mm) | 1 - 2 Days | $748.00 | ||
CPM-050-λ | Mounted | 0.500 in. (12.70 mm) | Specify λ 400-1600 in Checkout | 0.400 in. (10.16 mm) | 0.250 in. (6.35 mm) | 1 - 2 Days | $748.00 | ||
CP-100-0532 | Unmounted | 1.000 in. (25.40 mm) | 532 | 0.800 in. (20.3 mm) | 0.260 in. (6.60 mm) | 1 - 2 Days | $968.00 | ||
CP-100-0632.8 | Unmounted | 1.000 in. (25.40 mm) | 632.8 | 0.800 in. (20.3 mm) | 0.260 in. (6.60 mm) | 1 - 2 Days | $968.00 | ||
CP-100-0670 | Unmounted | 1.000 in. (25.40 mm) | 670 | 0.800 in. (20.3 mm) | 0.260 in. (6.60 mm) | 1 - 2 Days | $968.00 | ||
CP-100-0780 | Unmounted | 1.000 in. (25.40 mm) | 780 | 0.800 in. (20.3 mm) | 0.260 in. (6.60 mm) | 1 - 2 Days | $968.00 |
Dichroic Circular Polarizer
We offer circular polarizers in two basic designs, each for use in air:
Dichroic Polarizer / Zero-Order Retarder
Beamsplitting Polarizer / Zero-Order Retarder
Meadowlark Optics Dichroic Circular Polarizers consist of a dichroic linear polarizer and true zero-order quarter-wave retarder. Precisely aligning the retarder fast axis at 45° to the linear polarization direction ensures optimum performance.
True zero-order retarders are used in the assembly of our Dichroic Circular Polarizers and tight retardance tolerances contribute to the final performance. Once aligned, both polarizer and retarder materials are laminated between optically flat substrates, providing a peak-to-valley transmitted wavefront distortion of less than λ/5. Anti-reflection coated windows ensure surface reflection losses are minimized.
Achievement of the desired polarization effect requires proper orientation of your Dichroic Circular Polarizer; be sure to position the indicator marking in the direction of beam propagation. Our standard Dichroic Circular Polarizers are designed for single wavelength applications.
See Details
SPECIFICATIONS |
|
|
Standard Wavelengths |
532, 632.8, 670, 780, 850, 1064, and 1550 nm |
|
Substrate Material |
N-BK7 |
|
Polarizer Material |
Dichroic Polymer |
|
Retarder Material |
Birefringent Polymer |
|
Transmitted Wavefront Distortion (P-V @ 632.8 nm) |
|
|
Visible |
≤ λ/5 |
|
Beam Deviation |
|
|
Visible |
≤ 1 arc-min |
|
Surface Quality |
40 – 20 scratch-dig |
|
Reflectance (per surface) |
≤ 0.5% |
|
Isolation |
> 99.8% |
|
Storage Temperature |
-20˚C to +50˚C |
|
Operating Temperature |
-20˚C to +50˚C |
|
Laser Damage Threshold |
1 W/cm², CW |
Prolonged exposure to strong ultraviolet radiation may damage these polarizers.
Ordering Information – Contact Us or Buy Online
ORDERING INFORMATION |
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Mounted |
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Clear Aperture |
Thickness |
Diameter |
Part Number |
|
0.40 |
0.25 |
Ø 1.00 |
CPM–050–λ |
|
0.70 |
0.35 |
Ø 1.00 |
CPM–100–λ |
|
1.20 |
0.50 |
Ø 2.00 |
CPM–200–λ |
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Unmounted |
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Clear Aperture |
Thickness |
Diameter |
Part Number |
|
0.40 |
0.13 |
Ø 0.50 |
CP–050–λ |
|
0.80 |
0.26 |
Ø 1.00 |
CP–100–λ |
Meadowlark Optics standard Dichroic Circular Polarizers provide left-hand circular output.
Please call to request a quote for right-hand output.
Append a “-RH” to your part number for right hand circular output.
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