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ATOptik specializes in manufacturing high-precision plano-concave lenses, particularly those made from visible-light glass (e.g., BK7, fused silica) with customizable specifications. These lenses are engineered to meet demanding optical requirements in scientific, industrial, and medical applications. Below is a detailed overview of their features and capabilities, supported by industry-standard technical insights.
The plano-concave lens consists of one flat surface and one concave surface, with a negative focal length. It is designed to diverge parallel light rays, making them appear to originate from a virtual focal point. This lens is primarily used for beam expansion, divergence control, and optical system correction.
| Specifications | Normal | High Precision | Mfg. Limit |
| Material : | Optical glass | Optical glass | Optical glass |
| Design Index : | 1.5168 | 1.5168 | 1.5168 |
| Diameter Tolerance : | +0/-0.1mm | +0/-0.05mm | +0/-0.01mm |
| Thickness Tolerance : | +/-0.1mm | +/-0.05mm | +/-0.01mm |
| Focal Length Tolerance : | +/-2% | +/-1% | +/-0.5% |
| Centeration : | 3 arc min | 1 arc min | 10 arc sec |
| Surface Quality : | 60-40 | 40-20 | 10-5 |
| Surface Figure : | 3 Iambda | 2 lambda | 1 lambda |
| Surface Irregularity : | 1/4 lambda | 1/10 lambda | 1/20 Iambda |
| Clear Aperture : | >80% | >90% | 100% |
| Bevel : | +/-0.2*45 degree | +/-0.1*45 degree | +/-0.05*45degree |
Beam Expansion:
Plano-concave lenses are often used as beam expanders in laser systems to increase the beam diameter, reduce spot size, or control the divergence angle.
Optical System Correction:
These lenses can help correct spherical aberrations or other optical aberrations in optical systems, thereby improving imaging quality and system precision.
Scientific and Industrial Instruments:
Plano-concave lenses are also utilized in scientific research, measurement devices, and projection systems to control beam divergence and optimize optical performance.
Surface accuracy: Up to λ/10 (tested via interferometry) for laser-grade applications
Tolerances:
Diameter: ±0.01 mm
Center thickness: ±0.02 mm
Focal length: ±0.5%
Edge treatment: Blackened or chamfered edges to minimize stray light
Anti-reflective (AR) coatings: Reflectivity <0.2% for visible wavelengths (e.g., 532 nm, 632.8 nm)
High laser-induced damage threshold (LIDT) coatings: Ideal for high-power laser systems (e.g., 1064 nm)
Custom coatings (e.g., beam splitters, filters) available.
Yes. ATOPTIK can review customer drawings or optical prescriptions covering material, diameter, radii, center thickness, focal length, surface quality, centration, coating and quantity. Final feasibility depends on the complete lens design.
If you would like to build your own precision optical products or request a quote, please click one of the two buttons below. Otherwise, please fill out the form below with any questions or concerns.
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B3 Shengshi Shengshi Industrial Park，Auto-ETDZ, Changchun, Jilin, China
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