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Achromatic Zero-Order Waveplates
Introduction:
Achromatic Zero-Order waveplates are made of two different birefringent crystalline materials, such as Crystal Quartz and MgF2 to achieve wavelength independence comparing to single material waveplates which are very sensitive to the wavelength change. Achromatic waveplates is an ideal choice for tunable, multiple and board band wavelengths applications. CASTECH designs Achromatic Zero-Order Crystal Quartz-MgF2 waveplates with working wavelength range larger than 300nm and retardation accuracy better than λ/50 for λ/2 waveplate and better than λ/100 for λ/4 waveplate.
Main advantages：
• Extremely broad wavelength ranges
• High damage threshold for Air-spaced Achromatic Zero-Order waveplate
• Low sensitivity within the designed wavelength
• Retardation tolerance up to λ /100 over the wavelength range
CASTECH can offer two kinds of Achromatic Zero-Order Waveplates：Air Spaced and Optically Contacted Achromatic Zero-Order Waveplates.
Specifications：
| Material | Crystal Quartz and Magnesium Fluoride |
| Diameter Tolerance | +0/-0.2mm |
| Retardance Accuracy |
better than λ/50 for λ/2 achromatic waveplates better than λ/100 for λ/4 achromatic waveplates |
| Clear Aperture | ≥ central 90% of diameter |
| Surface Quality | 40/20 |
| Wavefront Distortion | λ/4 @ 632.8nmover the clear aperture |
| Parallelism | ≤10″ |
| Coating | AR coating at design wavelength |
| Damage Threshold | 500W/cm2,4J/cm2，20ns |
Order Information：
Achromatic Zero-Order Waveplates：
| Optically Contacted Achromatic Zero-Order Waveplate | Air-Spaced Achromatic Zero-Order Waveplate | ||
| Half Achromatic Waveplate | Quarter Achromatic Waveplate | Half Achromatic Waveplate | Quarter Achromatic Waveplate |
| WPAO-127-1/2-λ | WPAO-127-1/4-λ | WPAA-127-1/2-λ | WPAA-127-1/4-λ |
| WPAO-150-1/2-λ | WPAO-150-1/4-λ | WPAA-150-1/2-λ | WPAA-150-1/4-λ |
| WPAO-200-1/2-λ | WPAO-200-1/4-λ | WPAA-200-1/2-λ | WPAA-200-1/4-λ |
| WPAO-254-1/2-λ | WPAO-254-1/4-λ | WPAA-254-1/2-λ | WPAA-254-1/4-λ |
Standard Wavelength Ranges(λ)：
| 400-700nm | 700-1000nm | 1200-1650nm |
Note：
• Custom designs for other sizes and coatings are also available upon request.
• CASTECH’s standard coatings are available.
• Other waveplates with different wavelength range (between 400-2100nm) are also available upon request, please contact CAETECH for more information.
Products
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Achromatic Zero-Order Waveplates
- CASTECH design Achromatic Zero-Order Quartz-MgF2 waveplates with wavelength range larger than 300nm and retardation accuracy better than λ/50 for λ/2 waveplate and better than λ/100 for λ/4 waveplate.
-
Introduction:
Achromatic Zero-Order waveplates are made of two different birefringent crystalline materials, such as Crystal Quartz and MgF2 to achieve wavelength independence comparing to single material waveplates which are very sensitive to the wavelength change. Achromatic waveplates is an ideal choice for tunable, multiple and board band wavelengths applications. CASTECH designs Achromatic Zero-Order Crystal Quartz-MgF2 waveplates with working wavelength range larger than 300nm and retardation accuracy better than λ/50 for λ/2 waveplate and better than λ/100 for λ/4 waveplate.
Main advantages：
• Extremely broad wavelength ranges
• High damage threshold for Air-spaced Achromatic Zero-Order waveplate
• Low sensitivity within the designed wavelength
• Retardation tolerance up to λ /100 over the wavelength range
CASTECH can offer two kinds of Achromatic Zero-Order Waveplates：Air Spaced and Optically Contacted Achromatic Zero-Order Waveplates.
Specifications：
| Material | Crystal Quartz and Magnesium Fluoride |
| Diameter Tolerance | +0/-0.2mm |
| Retardance Accuracy |
better than λ/50 for λ/2 achromatic waveplates better than λ/100 for λ/4 achromatic waveplates |
| Clear Aperture | ≥ central 90% of diameter |
| Surface Quality | 40/20 |
| Wavefront Distortion | λ/4 @ 632.8nmover the clear aperture |
| Parallelism | ≤10″ |
| Coating | AR coating at design wavelength |
| Damage Threshold | 500W/cm2,4J/cm2，20ns |
Order Information：
Achromatic Zero-Order Waveplates：
| Optically Contacted Achromatic Zero-Order Waveplate | Air-Spaced Achromatic Zero-Order Waveplate | ||
| Half Achromatic Waveplate | Quarter Achromatic Waveplate | Half Achromatic Waveplate | Quarter Achromatic Waveplate |
| WPAO-127-1/2-λ | WPAO-127-1/4-λ | WPAA-127-1/2-λ | WPAA-127-1/4-λ |
| WPAO-150-1/2-λ | WPAO-150-1/4-λ | WPAA-150-1/2-λ | WPAA-150-1/4-λ |
| WPAO-200-1/2-λ | WPAO-200-1/4-λ | WPAA-200-1/2-λ | WPAA-200-1/4-λ |
| WPAO-254-1/2-λ | WPAO-254-1/4-λ | WPAA-254-1/2-λ | WPAA-254-1/4-λ |
Standard Wavelength Ranges(λ)：
| 400-700nm | 700-1000nm | 1200-1650nm |
Note：
• Custom designs for other sizes and coatings are also available upon request.
• CASTECH’s standard coatings are available.
• Other waveplates with different wavelength range (between 400-2100nm) are also available upon request, please contact CAETECH for more information.
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