UV Air-Spaced Achromatic Doublets, AR-Coated: 245 - 400 nm
- Minimal Focal Length Shift Over the Design Wavelength Range
- Air-Spaced Design for Superior Performance and High Power Handling
- 1" Outer Diameter Aluminum Housing
Each mount includes an engraved arrow
indicating the direction of light propagation
required to collimate a point source.
|Wavelength Range||245 - 400 nm|
|Design Wavelengths||282.5, 325.0, and 367.5 nm|
|Surface Quality||10-5 Scratch-Dig
(to Prevent Scattering from
|Clear Aperture||Ø20 mm|
|Focal Length Tolerance||±1% at 325.0 nm|
|AR Coating||Ravg < 0.5% from 245 - 400 nm|
|Housing||Ø1" 6061-T6 Aluminum Barrel|
|Click on the red Document icon next to the item numbers below to access the Zemax file download. Our entire Zemax Catalog is also available.|
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Air-Spaced Achromatic Doublet in an SM1L30C Slotted Lens Tube with Two SM1RR Retaining Rings
- Air-Spaced Design Provides Excellent Aberration Performance
- Ø20 mm Clear Aperture
- 1" Outer Diameter for Mounting Inside a Ø1" Lens Tube
- AR Coating for the 245 - 400 nm Range
Thorlabs' Air-Spaced Achromatic Doublets are designed to provide superior spherical and chromatic aberration correction. Air-Spaced Doublets have an optical design with four degrees of freedom. These extra variables allow the performance of these air-spaced doublets to exceed the performance of equivalent cemented doublets in some cases. For details, please see the Performance tab. The air-spaced design is also highly resistant to laser damage, since no cement is utilized in the fabrication process.
The doublets are pre-mounted in an aluminum barrel with tight tolerances on lens and barrel diameter to minimize the effects of lens decentering. Each mount includes an engraving with the part number, AR coating wavelength, focal length, and the direction of light propagation required to collimate a point source. The mount has a 1" outer diameter for mounting inside a Ø1" lens tube (as shown in the photo to the right).
Note: We do not recommend disassembly of these lenses, as this may affect performance.
UV Air-Spaced Achromatic Doublet Performance
The tables below contains links to pop-ups with plots containing the theoretical performance of each air-spaced achromatic doublet.
|Item #||Transmission Plota||Left Lens Materialb||Right Lens Materialb|
|ACA254-100-UV||CaF2||UV Fused Silica|
|ACA254-150-UV||CaF2||UV Fused Silica|
|ACA254-200-UV||CaF2||UV Fused Silica|