61-6998-40 High Precision Polished Aspheric Lens Outer Diameter φD: φ10mm Focal Length: 8mm AGL-10-GA-08P
Analyzer, Testing Equipment

61-6998-40 High Precision Polished Aspheric Lens Outer Diameter φD: φ10mm Focal Length: 8mm AGL-10-GA-08P

model: 61-6998-40
brand: SIGMAKOKI CO., LTD.

Product Description

Product Model: 61-6998-40Product Brand: SIGMAKOKI CO., […]

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Product Details

Product Model: 61-6998-40
Product Brand: SIGMAKOKI CO., LTD.

Features

  • It is a precision polished aspheric lens which can focus the beam to almost the diffraction limit when a plane wave is injected.
  • It is ***d when the light of a semiconductor laser is made to be parallel light or when the parallel light is concentrated in a fiber.
  • Increasing the NA (numerical aperture) enables efficient light harvesting.
  • Available in the AGL-EA/AGL-GA series with a shape error of 0.1 μm or less and the AGL-EB/AGL-GB series with a shape error of 0.5 μm or less.
  • A lens holder (LHF-S, LHA) is provided for fixing the lens.
  • * The aspherical lens has a light incident direction.
  • * Be sure to allow parallel light to enter from a convex surface.
  • * When parallel light is incident from the plane side, the spherical aberration becomes large and light cannot be condensed.
  • * When using at wavelengths other than the design wavelength, spherical aberration occurs, and the condensing spot cannot be narrowed to the diffraction limit.
  • * This precision polished aspheric lens is not an achromatic lens.
  • * The focal length (back focus) will change when the watch is ***d with a wavelength other than the total wavelength.
  • * Since the lens is not coated with an anti-reflection film, the transmittance of the lens is less than 85% due to the loss ca***d by reflection of the front and back surfaces of the lens.

Spec

  • [ common specification]
  • Material: S-LAH64
  • Refractive index: 1.792 (546.1nm), 1.777 (780nm)
  • Abbe's number ν d: 47.37
  • Back shape: Plane
  • Eccentricity: < 3′
  • Coating: No coat
  • Effective diameter: 90% of the outer diameter
  • Scratch - dig: 60-40
  • [Individual specification]
  • Design wavelength: 780nm
  • Outer diameter φD: φ10mm
  • Focus distance f: 8mm
  • Back focus fb: 5.89mm
  • NA: 0.54
  • Edge thickness te: 1.76mm
  • Center thickness tc: 3.9mm
  • Shape error: < 0.1μm

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