12.5mm Dia x -20mm FL VIS 0°, Inked, Negative Achromatic Lens

Name: 12.5mm Dia x -20mm FL VIS 0°, Inked, Negative Achromatic Lens
Brand: TECHSPEC
SKU: 62-485-INK
Price: ₹9,000 INR

Stock #62-485-INK Contact Us Other Coating Options

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₹9,000

Volume Pricing
Qty 1-5	₹9,000 each
Qty 6-25	₹7,650 each
Qty 26-49	₹7,200 each
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Specifications

General

Type:

Negative Achromatic Lens

Physical & Mechanical Properties

Diameter (mm):

12.50 ±0.025

Clear Aperture CA (mm):

11.50

Centering (arcmin):

Center Thickness CT (mm):

5.50 ±0.10

Center Thickness CT 1 (mm):

2.00 ±0.05

Center Thickness CT 2 (mm):

3.50 ±0.05

Edge Thickness ET (mm):

7.01

Bevel:

Protective as needed

Optical Properties

Effective Focal Length EFL (mm):

-20.00

Focal Length Tolerance (%):

±1

Back Focal Length BFL (mm):

-22.88

Focal Length Specification Wavelength (nm):

587.6

Radius R₁ (mm):

-13.80

Radius R₂ (mm):

9.99

Radius R₃ (mm):

109.48

N-BAF10 / N-SF10

Surface Quality:

40-20

f/#:

1.6

Numerical Aperture NA:

0.31

Coating:

VIS 0° (425-675nm)

Coating Specification:

R_avg ≤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

Certificate of Conformance:

View

Product Details

VIS 0° and VIS-NIR Coatings
6.25 – 25mm Diameter Options
MgF₂ Coated Negative Achromatic Lenses also Available

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.

Technical Information

Accessories

Coating Curves

Custom

Edmund Optics offers comprehensive custom manufacturing services for optical and imaging components tailored to your specific application requirements. Whether in the prototyping phase or preparing for full-scale production, we provide flexible solutions to meet your needs. Our experienced engineers are here to assist—from concept to completion.

Our capabilities include: