雙凸透鏡
These lenses are primarily used for imaging at close to 1:1, illustrates their function. The convex surfaces of approximately equal to the radius of curvature. The lenses have very low optical aberration at magnifications from 5 to 0.2. At these magnifications, coma, distortion, and chromatic aberrations are minimal.
Because both convex surfaces contribute to the magnifying power, these lenses are available with useful for collecting and refocusing light from a small beams in applications where the length of an optical train spot quality, you should use two lenses; one to collimate the diverging beam, and the second to focus the collimated beam to a small spot.
Specifications
Material: ............................BK7, Silica, CaF2, Silicon, etc.
Diameter Tolerance: ....................................+0.0, -0.1 mm
tc tolerance: ......................................................±0.1mm
Clear Aperture: .......................................................>85%
Surface Quality: .....................................................40-20
Flatness: ....................................................N=2, △N=0.5
Centration: ...................................................±3 arc mins
Size (φ): ...........................................3 to 200mm or larger
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Part No.
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F(mm)
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Dia(mm)
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Rad1=Rad2(mm)
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Tc(mm)
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Te(mm)
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fb(mm)
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DCVL 101
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8.0
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6.0
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7.70
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3.2
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2.0
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6.9
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DCVL 102
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10.0
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10.0
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9.45
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4.9
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2.0
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8.2
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DCVL 103
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20.0
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12.7
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20.01
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4.0
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2.0
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18.6
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DCVL 104
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50.0
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12.7
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51.35
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2.8
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2.0
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49.1
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Note: Other sizes and specifications are available upon request.
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