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All Products / Optics / Optical Lenses / Achromatic Lenses / Broadband AR Coated Negative Achromatic Lenses
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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

25mm Dia x -75mm FL VIS 0°, Inked, Negative Achromatic Lens

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Stock #62-493-INK 10-15 days
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A$201.60
Qty 1-5
A$201.60
Qty 6+
A$171.20
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Product Details

Type:
Negative Achromatic Lens

Physical & Mechanical Properties

Diameter (mm):
25.00 ±0.025
Clear Aperture CA (mm):
24.00
Centering (arcmin):
<1
Center Thickness CT (mm):
6.56 ±0.20
Center Thickness CT 1 (mm):
2.50 ±0.10
Center Thickness CT 2 (mm):
4.06 ±0.10
Edge Thickness ET (mm):
8.90
Bevel:
Protective bevel as needed

Optical Properties

Effective Focal Length EFL (mm):
-75.00
Focal Length Tolerance (%):
±1
Back Focal Length BFL (mm):
-77.65
Focal Length Specification Wavelength (nm):
587.6
Radius R1 (mm):
-46.07
Radius R2 (mm):
36.65
Radius R3 (mm):
108.00
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-BK7 / N-SF5
Surface Quality:
40-20
f/#:
3.00
Numerical Aperture NA:
0.17
Coating:
VIS 0° (425-675nm)
Coating Specification:
Ravg ≤0.4% @ 425 - 675nm
Power (P-V) @ 632.8nm:
1.5λ
Irregularity (P-V) @ 632.8nm:
λ/4
Wavelength Range (nm):
425 - 675

Regulatory Compliance

RoHS:
Compliant
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Certificate of Conformance:
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Product Family Description

TECHSPEC® Broadband AR Coated Negative Achromatic Lenses are corrected for color and on-axis aberrations. These lenses, consisting of two optical elements cemented together, are commonly used as Barlow lenses to extend focal lengths. The achromatic lenses are available in various diameter sizes and VIS 0° or VIS-NIR coating options. TECHSPEC® Broadband AR Coated Negative Achromatic Lenses are offered in 6.25 - 25mm diameter options. MgF2 Coated Negative Achromatic Lenses are also available.