61-6900-23 Plano Concave Lens BK7 φ30mm Focal Length -35mm SLB-30-35N
Analyzer, Testing Equipment

61-6900-23 Plano Concave Lens BK7 φ30mm Focal Length -35mm SLB-30-35N

model: 61-6900-23
brand: SIGMAKOKI CO., LTD.

Product Description

Product Model: 61-6900-23Product Brand: SIGMAKOKI CO., […]

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Product Details

Product Model: 61-6900-23
Product Brand: SIGMAKOKI CO., LTD.

Features

  • With a simple shape, collimated laser light can be spread.
  • It can be ***d in combination with a convex lens to increase the beam diameter or the illumination area.
  • 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 a wide range of variations, subdivided by outer diameter size and focal length.
  • * The concave lens cannot collect light or tie a real image by itself.
  • * Use in combination with convex lenses.
  • * Spherical flat concave lenses have chromatic aberration, and the focal length dep***s on the wavelength.
  • * Flat concave lenses allow light to enter.
  • * Allow parallel light to enter from the concave side.
  • * Doing the reverse operation will ca*** spherical aberration to increase, which may result in poor optical performance of the optical system.

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: φ30mm
  • Focus distance f: ?35mm
  • Edge thickness te: 9.9mm
  • Center thickness tc: 2mm
  • Back focus fb: ?36.3mm
  • Curvature half diameter r: 18.17mm
  • Eccentricity: <1′
  • RoHS conform product

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