Cemented Achromatic Lens, Operating Wavelength: 400-1100 nm OLD2436-T5
Achromats generally cement multiple elements, alternating positive low-index materials such as crown glass with negative high-index materials such as flint glass. Optimization lets negative elements compensate positive dispersion to minimize chromatic aberration. Nearly constant focal length across the band gives excellent off-axis performance. Compared with singlets, cemented achromats provide more design choices for imaging and laser beam control. Computer optimization minimizes aberrations and focal spots. JCOPTIX visible-near-infrared achromats are designed at 488 nm, 707 nm, and 1064 nm and outperform singlets for monochromatic applications in this range, producing diffraction-limited laser spots. JCOPTIX visible achromats have diameters of 12.7 mm, 25.4 mm, and 50.8 mm and operating options of 400-700 nm, 650-1050 nm, 1050-1700 nm, or 400-1100 nm. Band-optimized AR coatings reduce average reflection below 1% per surface to improve transmission. Contact technical support for other custom requirements.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Optical element material | N-BAF10/N-SF6 |
| Diameter | 25.4 mm |
| Clear Aperture Dimension | >90% of Outer Diameter |
| Operating Wavelength | 400-1100 nm |
| Focal Length | 50.0 mm |
| Back focal length | 43.39 mm |
| Radius of curvature 1 | 34.9 mm |
| Radius of curvature 2 | -28.8 mm |
| Radius of curvature 3 | -137.5 mm |
| Center Thickness | 12.5 mm |
| Center thickness 1 | 9.0 mm |
| Center thickness 2 | 3.5 mm |
| Coating | Antireflection Coating |
| Antireflection Coating R_avg [400-1100 nm] | R_avg< 1% @ 400-1100 nm |
| Diameter Tolerance | +0.0/-0.1 mm |
| Thickness Tolerance | ± 0.1 mm |
| Focal Length Tolerance | ± 1% |
| Decentration | < 3 arcmin |
| Surface figure PV value | λ/4 |
| Spherical surface fringe count | 3 |
| Surface quality (scratch/dig) | 40/20 |
| Operating Temperature | -40 - +85 °C |
| General Parameters - Design Wavelength | 488 nm、707 nm、1064 nm |
Key Features
Datasheet
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