Plano Concave Lens Synthetic Fused Silica 20mm Diameter −50mm Focal Length
SLSQ-20-50N
These simple negative lenses have many uses. Alone they form a virtual image of a distant object or collimated light source. Used in combination with other optics they reduce the power of the system. Sharp edges which are common in negative lenses are removed by beveling in order to reduce the likelihood of chipping.
◦There are three types of plano concave lenses available; synthetic fused silica for wavelengths less than 350nm ultraviolet light, and synthetic fused silica lens for excimer laser wavelengths such as KrF (248nm) and ArF (193nm).
◦Our lenses are listed by outside diameter and focal length to assist your selection according to required specifications.
◦Our lenses are listed by outside diameter and focal length to assist your selection according to required specifications.
| Name | Plano Concave Lens Synthetic Fused Silica 20mm Diameter −50mm Focal Length |
|---|---|
| Weight | 0.0500kgs |
| Standard Coatings Available | Yes |
| Guide |
|
| Remark | - |
| Attention |
|
| Diameter φD | 20mm |
| Focal length | 50mm |
| Material | Synthetic fused silica |
| Design Wavelength | 546.1nm |
| Refractive index n<sub>e</sub> | 1.46 |
| Coating | Uncoated |
| Clear aperture | 90% of the diameter |
| Surface Quality (Scratch-Dig) | 20-10 |
| Diameter φD | φ20mm |
| Focal length f | −50mm |
| Edge thickness te | 4.3mm |
| Center thickness tc | 2mm |
| Back focal length fb | −51.4mm |
| Radius of curvature r | 23mm |
| Centration | ＜1′ |
In stock
SKU
SLSQ-20-50N
€98.50
These simple negative lenses have many uses. Alone they form a virtual image of a distant object or collimated light source. Used in combination with other optics they reduce the power of the system. Sharp edges which are common in negative lenses are removed by beveling in order to reduce the likelihood of chipping.
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