
Analyzer, Testing Equipment
61-6905-59 Biconvex Lens BK7 φ25mm Focal Length 26.5mm SLB-25B-25P
Product Description
Product Model: 61-6905-59Product Brand: SIGMAKOKI CO., […]
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Product Details
Product Model: 61-6905-59
Product Brand: SIGMAKOKI CO., LTD.
Features
- By making both sides convex, this lens can efficiently refract light in a small space and collect more light.
- Use this function when you want to collect collimated light at the shortest distance possible or when you want to collect as much light as possible from the emission point.
- A lens made by BK7 for the visible to near-infrared range.
- Three types of lenses with anti-reflection film are available in the visible, near-infrared and infrared ranges.
- It can be selected according to your specifications from the wide variety of subdivided by outer diameter size and focal length.
- Chromatic aberration corrected achromatic lenses (DLB) are also available.
- * Spherical biconvex lenses have chromatic aberration, and the focal length dep***s on the wavelength.
- * The spherical aberration of a biconvex lens is larger than that of a plano-convex lens, and the focus spot may not be concentrated at one point.
- * The transmittance of the uncoated product is about 90% due to the loss ca***d by the reflection of the front and back of the lens.
Spec
-
[
common specification]
- Material: BK7
- Design wavelength: 546.1nm
- Refractive index: n e=1.519
- Coating: No coat
- Effective diameter: 90% of the outer diameter
- Scratch - dig: 20-10
- [Individual specification]
- Reflective prevention film coat wavelength region: No coat
- Outer diameter φD: φ25mm
- Focus distance f: 26.5mm
- Edge thickness te: 2mm
- Center thickness tc: 8.4mm
- Back focus fb: 23.5mm
- Curvature half diameter r: 25.95mm
- Eccentricity: <1′
- RoHS conform product
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