Precision Optical-Glass Achromatic Doublets
Precision glass achromatic doublets combine two lens elements selected to correct chromatic aberration at two widely separated wavelengths, usually blue and red. The focal length is unchanged at these wavelengths, with almost no focal shift across the visible band.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | Low-index crown glass & high-index quartz glass; CDGM, Schott, Ohara, etc. |
| Dimensional Tolerance | ±0.1mm (standard version), ±0.01mm (high-precision version) |
| Center Thickness Tolerance | ±0.1mm (Standard);±0.05mm (High Precision) |
| Paraxial Focal Length | ±2% |
| Surface Finish | 60/40 (Standard);20/10 (High Precision) |
| Clear Aperture Dimension | >85% |
| Surface Figure [633nm] | λ/2 (Standard);λ/4 (High Precision) @633nm |
| Centration Error | 3 arcmin |
| Edge Bevel [45°] | <0.25mm×45° |
| Coating | According to Requirements |
| Available Coatings [Achromatic Lens] | VIS 0° and VIS-NIR |
Applications
Key Features
Datasheet
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Supplier Information
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