◆ Features
Null Interferometry Implementation: Combined with interferometers (e.g., Fizeau interferometers), CGHs enable null testing for measuring form errors of cylindrical, aspheric, and freeform optical surfaces.
High detection accuracy: CGH generate precise phase distributions through computational design, producing tailored test wavefronts with accuracy up to λ/20 PV.
Optical System Simplification: Serving as replacements for traditional compensators (e.g., null lenses), CGHs reduce system complexity, minimize alignment sensitivity, and decrease overall footprint.
◆ Common Specifications
Material | Fused Silica |
Accuracy | 6 nm RMS |
Thicknesses | 6.35 mm |
Tilt Angle | 1°（CGH relative to the interferometer in the x-direction） |
Interferometer wavelength | 632.82 nm |
Incident light | Parallel light |
◆ Applications
◇ Scientific Research and Ultra-Precision Manufacturing
◇ Astronomy, High Energy Laser System Mounting
◇ Biomedical and Microscopic Imaging
◇ Industrial Manufacturing and Quality Control
◆ One selection program is available for download. Enter the dimensions and R-value of the column mirror to be measured to obtain the appropriate CGH model.
◆ Cleaning method: Use dust-free compressed air to blow the surface. If there is any contamination, use anhydrous ethanol and dust-free cotton swabs to wipe in one direction to avoid scratches.
◆ Storage conditions: Stored in a dry and clean environment, stacking is strictly prohibited to avoid microstructural damage or pressure-induced surface deformation.
◆ Environmental stability requirements: Laboratory temperature fluctuations must be maintained within <±0.5°C (critical for large-scale CGHs) to prevent thermal distortion-induced surface figure errors.Utilize optical vibration isolation tables to mitigate ground-borne vibration effects on interferometric fringe patterns.
Material | Fused Silica | Overall Dimension | 50.8 mm*50.8 mm |
Alignment Zone Size | 45 mm*45 mm | Primary Hologram Aperture | 38 mm*38 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 0.7 | BFD | 18.62 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 50.8 mm*50.8 mm |
Alignment Zone Size | 45 mm*45 mm | Primary Hologram Aperture | 38 mm*38 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 1 | BFD | 32.91 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 50.8 mm*50.8 mm |
Alignment Zone Size | 45 mm*45 mm | Primary Hologram Aperture | 38 mm*38 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 1.5 | BFD | 53.74 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 50.8 mm*50.8 mm |
Alignment Zone Size | 45 mm*45 mm | Primary Hologram Aperture | 38 mm*38 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 2 | BFD | 73.59 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 50.8 mm*50.8 mm |
Alignment Zone Size | 45 mm*45 mm | Primary Hologram Aperture | 38 mm*38 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 3 | BFD | 112.41 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 50.8 mm*50.8 mm |
Alignment Zone Size | 45 mm*45 mm | Primary Hologram Aperture | 38 mm*38 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 4 | BFD | 150.81 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 50.8 mm*50.8 mm |
Alignment Zone Size | 45 mm*45 mm | Primary Hologram Aperture | 38 mm*38 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 5 | BFD | 189.05 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 50.8 mm*50.8 mm |
Alignment Zone Size | 45 mm*45 mm | Primary Hologram Aperture | 38 mm*38 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 6 | BFD | 227.21 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 101.6 mm*101.6 mm |
Alignment Zone Size | 95 mm*95 mm | Primary Hologram Aperture | Ø95 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 0.6 | BFD | 31.51 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 101.6 mm*101.6 mm |
Alignment Zone Size | 95 mm*95 mm | Primary Hologram Aperture | Ø95 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 1 | BFD | 82.27 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 101.6 mm*101.6 mm |
Alignment Zone Size | 95 mm*95 mm | Primary Hologram Aperture | Ø95 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 1.5 | BFD | 134.35 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 101.6 mm*101.6 mm |
Alignment Zone Size | 95 mm*95 mm | Primary Hologram Aperture | Ø95 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 2 | BFD | 183.97 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 101.6 mm*101.6 mm |
Alignment Zone Size | 95 mm*95 mm | Primary Hologram Aperture | Ø95 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 3 | BFD | 281.01 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 101.6 mm*101.6 mm |
Alignment Zone Size | 95 mm*95 mm | Primary Hologram Aperture | Ø95 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 4 | BFD | 377.02 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 101.6 mm*101.6 mm |
Alignment Zone Size | 95 mm*95 mm | Primary Hologram Aperture | Ø95 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 5 | BFD | 472.62 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 101.6 mm*101.6 mm |
Alignment Zone Size | 95 mm*95 mm | Primary Hologram Aperture | Ø95 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 6 | BFD | 568.02 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 152 mm*152 mm |
Alignment Zone Size | Ø145 mm | Primary Hologram Aperture | Ø140 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 0.6 | BFD | 46.43 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 152 mm*152 mm |
Alignment Zone Size | Ø145 mm | Primary Hologram Aperture | Ø140 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 1 | BFD | 121.24 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 152 mm*152 mm |
Alignment Zone Size | Ø145 mm | Primary Hologram Aperture | Ø140 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 1.5 | BFD | 197.99 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 152 mm*152 mm |
Alignment Zone Size | Ø145 mm | Primary Hologram Aperture | Ø140 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 2 | BFD | 271.11 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 152 mm*152 mm |
Alignment Zone Size | Ø145 mm | Primary Hologram Aperture | Ø140 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 3 | BFD | 414.13 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 152 mm*152 mm |
Alignment Zone Size | Ø145 mm | Primary Hologram Aperture | Ø140 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 4 | BFD | 555.61 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 152 mm*152 mm |
Alignment Zone Size | Ø145 mm | Primary Hologram Aperture | Ø140 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 5 | BFD | 696.49 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
Material | Fused Silica | Overall Dimension | 152 mm*152 mm |
Alignment Zone Size | Ø145 mm | Primary Hologram Aperture | Ø140 mm |
Thickness | 6.35 mm | Accuracy | 6 nm RMS |
F# | 6 | BFD | 837.08 mm |
Etch Depth | 430 nm | Incident Light | Collimated Light |
Interferometer Wavelength | 632.82 nm | Tilt Angle | 1°（CGH tilt about X w.r.t. interferometer） |
CGH
