AS ONE AS ONE

取扱点数300万点
How to use
Cách sử dụng
Contact us
SIGMAKOKI CO., LTD.

61-6906-56　Biconvex Lens BK7 φ40mm Focal Length 200.6mm　SLB-40B-200PM

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 depends 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 caused 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: Reflective prevention film (400 - 700nm)
  • Transmittance: > Average 99%
  • Laser durability (reference value): Reflective prevention film coat 4J/cm^2 (pulse width 10ns, Repeat frequency 20Hz)
  • Effective diameter: 85% of outer diameter
  • Scratch - dig: 20-10
  • [Individual specification]
  • Reflective prevention film coat wavelength region: 400 - 700nm
  • Outer diameter φD: φ40mm
  • Focus distance f: 200.6mm
  • Edge thickness te: 2mm
  • Center thickness tc: 3.9mm
  • Back focus fb: 199.4mm
  • Curvature half diameter r: 207.6mm
  • Eccentricity: ＜1′
  • RoHS conform product
  •  
Order No. 61-6906-56
Model No. SLB-40B-200PM
Standard price JPY: 8,800 USD: 54.75
Excange rate 1USD= 160.72JPY
Valid price in Japan
Quantity 1piece
Stock in Japan
Supplier Stock