Sapphire Concave Lens,glass lens manufacturer,glass spheric lens
A plano-concave lens is compose of a plane and concave surface, has a negative focal length and
negative spherical aberration, which often can be used to expand beam or increase focal length, and
balance out aberrations of other lenses in the system. The used materials include BK7, SF11, UV-fusedsilica, and CaF2,etc.
Technical parameters
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1
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Material
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BK7 or Fused silica
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2
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dia tolerance
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+0.0/-0.1mm
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3
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center thickness tolerance
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+/-0.1mm
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4
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surface figure
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lambda/2,lambda/4
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5
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focal length Tolerance
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+/-2%
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6
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centration
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3arc min
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7
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surface qualtiy
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60-40 scratch and dig
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|
8
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bevel
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0.2-0.5mm*45degree
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Features：
Diverges incident light, Reduce spherical aberation, High Precision Dimension Control, Optional Substrate Material.
Applications：
Beam expansion systems, Light projection systems, Optical Display Systems, Projection Optical Systems, Imaging Optical Systems, Laser Measurement Systems, etc.
Description:
Plano-Concave (PCV) or negative focal length lenses have a flat surface on one side and a spherical surface on the other. They are used to expand beams or to increase focal lengths in optical systems or other similar applications.
Plano - concave lenses are negative spherical lenses with one concave surface and one flat surface. These lenses can be used to expand light or to increase the focal length of an optical system.
Plano-concave lenses are available either uncoated or with single layer AR coating. Broadband multi-layer antireflection coating can be done on custom basis.
Simple shape lenses for spreading the collimated laser beam.
These are available for expanding the beam diameter or in combination with convex, expanding the irradiation area of illumination light.
Spherical Lens 