LAQ0304 - Precision grade aspheric lenses AR coated
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Ships from:
United Kingdom
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On FindLight:
since 2016
Description
Traditionally lens surfaces have been sections of a sphere. For many applications this leaves spherical aberration as the dominant defect of any image so created. Aspheric lenses are used to correct these image defects. One solution to this is to have one or both surfaces, departing from the spherical shape. Aspheric lenses can be very effective, focussing or collimating laser beams. Aspheric lenses are polished to a good surface finish but the surface is not spherical and shaped to reduce the aberrations from a single on axis point.
These precision grade aspheric lenses will provide excellent performance over the visible spectrum and NIR applications. The glass aspheric lenses are coated with a single-layer AR coating on high index flint glass achieving high transmission of 98% at the stated wavelength (Typical V coating designed for 550nm).
LAQ0304 - Precision grade aspheric lenses AR coated
Specifications |
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|---|---|
| Diameter: | 4.5 mm |
| Material: | N-BK7 |
| Effective Focal Length: | 3.3 mm |
| Numerical Aperture (NA): | 0.47 |
| Wavelength Range: | 350 – 1100 nm |
| Back FL: | 2.03 mm |
| Lens Aperture: | 3.52 mm |
| C/T: | 3.95 mm |
Features
Mounting options.
Stock lenses can be edged to smaller diameters.
Special AR coatings available on stock lenses.
Applications
Precision aspherical lenses are used in applications such as beam focusing/collimation and Imaging.
Frequently Asked Questions
Traditional spherical lenses cannot collimate light effectively because even small angles of incidence can produce spherical aberrations. The non-spherical surface of an aspheric lens allows a single component to effectively focus or collimate even highly divergent emissions, potentially replacing a multi-lens system with a single aspheric lens.
All products are tested in Knight Optical's state of the art metrology laboratory by highly trained technicians to ensure compliance with the specification. Parts are then sent to the QA team to be cleaned and checked for surface imperfections before dispatch.
Custom aspheric lenses are available in a range of sizes as small as 2mm diameter up to 100mm or greater.
Aspheric lenses are used to correct spherical aberration in lasers and imaging.
Aspheric lenses may be AR coated for UV/VIS/NIR.