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