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See all 49 Products in Family

TECHSPEC^® components are designed, specified, or manufactured by Edmund Optics. Learn More

25mm Diameter x -50 FL, VIS-NIR, Inked, Plano-Concave Lens

Name: 25mm Diameter x -50 FL, VIS-NIR, Inked, Plano-Concave Lens
Brand: TECHSPEC
SKU: 45-923-INK
Price: A$97.60

TECHSPEC VIS-NIR Coated Plano-Concave (PCV) Lenses

Stock #45-923-INK 10-15 days Other Coating Options

- +

A$97^.60

Qty 1-9
A$97.60

Qty 10+
A$88.00

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Product Downloads

STEP:stp

PDF Drawing:pdf

ISO 10110 Drawing

IGES:igs

Zemax:zar

Zemax:zmx

eDrawing:eprt

Code V:seq

EO Spec Sheet

Specifications
Product Details
Technical Information
Accessories
Coating Curves
Related Products
Imaging Lens Selector
Frequently Purchased Together
Compatible Mounts
Resources

Specifications

General

Type:

Plano-Concave Lens

Physical & Mechanical Properties

Diameter (mm):

25.00 ±0.025

Bevel:

Protective bevel as needed

Center Thickness CT (mm):

3.50

Center Thickness Tolerance (mm):

±0.10

Centering (arcmin):

Clear Aperture CA (mm):

24.00

Edge Thickness ET (mm):

6.33

Optical Properties

Effective Focal Length EFL (mm):

-50.00

N-BK7

f/#:

2.00

Numerical Aperture NA:

0.25

Coating:

VIS-NIR (400-1000nm)

Wavelength Range (nm):

400 - 1000

Back Focal Length BFL (mm):

-52.31

Coating Specification:

R_abs ≤0.25% @ 880nm
R_avg ≤1.25% @ 400 - 870nm
R_avg ≤1.25% @ 890 - 1000nm

Focal Length Specification Wavelength (nm):

587.6

Focal Length Tolerance (%):

±1

Radius R₁ (mm):

-25.84

Surface Quality:

40-20

5 J/cm² @ 532nm, 10ns

Power (P-V) @ 632.8nm:

1.5λ

Irregularity (P-V) @ 632.8nm:

λ/4

Regulatory Compliance

RoHS:

Compliant

Certificate of Conformance:

View

Product Details

AR Coated to Provide <1.25% Reflectance per Surface for 400 - 1000nm
<0.25% Reflectance @ 880nm
Designed for 0° Angle of Incidence
Various Coating Options: Uncoated, VIS-EXT, MgF₂, VIS 0°, YAG-BBAR, NIR I, and NIR II

TECHSPEC® VIS-NIR Coated Plano-Concave (PCV) Lenses are designed to bend parallel input rays to diverge from one another on the output side of the lens causing this lens to have a negative focal length. These lenses can be used for balancing aberrations created by other lenses within a system due to their negative spherical aberration. Plano-Concave (PCV) lenses are commonly used in a variety of applications including image reduction, beam expansion and telescopes. TECHSPEC® VIS-NIR Coated Plano-Concave (PCV) Lenses are optimized for transmission (>99%) in the near-infrared. These lenses are also available Uncoated, VIS-EXT, MgF₂, VIS 0°, YAG-BBAR, NIR I, or with NIR II AR coating options.

Technical Information

N-BK7
	Typical transmission of a 3mm thick, uncoated N-BK7 window across the UV - NIR spectra. Click Here to Download Data
	Typical transmission of a 3mm thick N-BK7 window with MgF2 (400-700nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: R_avg ≤ 1.75% @ 400 - 700nm (N-BK7) Data outside this range is not guaranteed and is for reference only. Click Here to Download Data
	Typical transmission of a 3mm thick N-BK7 window with VIS-EXT (350-700nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: R_avg≤ 0.5% @ 350 - 700nm Data outside this range is not guaranteed and is for reference only. Click Here to Download Data
	Typical transmission of a 3mm thick N-BK7 window with VIS-NIR (400-1000nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: R_abs≤ 0.25% @ 880nm R_avg≤ 1.25% @ 400 - 870nm R_avg≤ 1.25% @ 890 - 1000nm Data outside this range is not guaranteed and is for reference only. Click Here to Download Data
	Typical transmission of a 3mm thick N-BK7 window with VIS 0° (425-675nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: R_avg≤ 0.4% @ 425 - 675nm Data outside this range is not guaranteed and is for reference only. Click Here to Download Data
	Typical transmission of a 3mm thick N-BK7 window with YAG-BBAR (500-1100nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: R_abs ≤ 0.25% @ 532nm R_abs ≤ 0.25% @ 1064nm R_avg≤ 1.0% @ 500 - 1100nm Data outside this range is not guaranteed and is for reference only. Click Here to Download Data
	Typical transmission of a 3mm thick N-BK7 window with NIR I (600 - 1050nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: R_avg≤ 0.5% @ 600 - 1050nm Data outside this range is not guaranteed and is for reference only. Click Here to Download Data
	Typical transmission of a 3mm thick N-BK7 window with NIR II (750 - 1550nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: R_abs ≤ 1.5% @ 750 - 800nm R_abs ≤ 1.0% @ 800 - 1550nm R_avg≤ 0.7% @ 750 - 1550nm Data outside this range is not guaranteed and is for reference only. Click Here to Download Data

Accessories

Coating Curves

VIS-NIR (400-1000nm)

Only 2 different Y Axises can be displayed at one time.

Imaging Lens Selector

Frequently Purchased Together

12.5mm Dia. x 50mm FL, MgF<sub>2</sub> Coated, Achromatic Doublet Lens

#32-317 - 12.5mm Dia. x 50mm FL, MgF₂ Coated, Achromatic Doublet Lens

A$124.80

#39-454 - 21mm Dia., Metric Circle Crosshair, Contact Reticle

A$111.20

#40-043 - 127 x 178mm, 4-6λ Mirror

A$120.00

25mm Dia x -50mm FL Negative Doublet Lens MgF<sub>2</sub> Coated

#45-221 - 25mm Dia x -50mm FL Negative Doublet Lens MgF₂ Coated

A$179.20

Compatible Mounts

Title	Type	Stock Number	Price	Buy
25.0/25.4mm Optic Dia., SM1 Thin Mount, M4	Fixed	#13-787	A$31.20 Request Quote	3-5 days ×
25.0/25.4mm Optic Dia., SM1 Thin Mount, 8-32	Fixed	#13-788	A$31.20 Request Quote	3-5 days ×
25.0mm Optic Dia., Optic Mount	Fixed	#64-560	A$48.80 Request Quote	3-5 days ×
30mm Cage 25/25.4mm Diameter Thick Lens Mount	Fixed	#85-588	A$68.40 Request Quote	In Stock ×
25/25.4mm Diameter, T-Mount Thick Optic Mount	Fixed	#52-293	A$104.80 Request Quote	Contact Us ×
25.0/25.4mm Optic Dia., L-Slot Direct Mount	Fixed	#36-410	A$106.40 Request Quote	3-5 days ×
25.0/25.4mm Optic Dia., Side Flange Direct Mount	Fixed	#36-414	A$106.40 Request Quote	3-5 days ×
25mm Thick Inner Pair Optic Mounts	Fixed	#11-054	A$106.40 Request Quote	3-5 days ×
25.0/25.4mm Optic Dia., L-Slot and Rotation Direct Mount	Adjustable - Rotary	#36-411	A$152.00 Request Quote	3-5 days ×
25/25.4mm Diameter, C-Mount Thick Optic Mount	Fixed	#56-354	A$156.80 Request Quote	In Stock ×
25.0/25.4mm Optic Dia., X-Y Translating Optic Mount	Adjustable - Linear (XY)	#62-956	A$412.80 Request Quote	3-5 days ×
25.0/25.4mm Optic Dia., X-Y-Z Translating Optic Mount	Adjustable - Linear (XYZ)	#62-959	A$808.00 Request Quote	3-5 days ×
25.0/25.4mm Optic Dia., 5 Axes Optical Mount	Adjustable - Linear (XYZ) & Tip-Tilt	#13-776	A$1,128.00 Request Quote	Contact Us ×

Check out our full selection of mounts here.

Resources

Filter

Anti-Reflection (AR) Coatings

Anti-reflection (AR) coatings are applied to optical components to increase throughput and reduce hazards caused by back-reflections.

View Now

An Introduction to Optical Coatings

Optical coatings are used to influence the transmission, reflection, or polarization properties of an optical component.

View Now

Lens Geometry Performance Comparison

This comparison of the performance of aspheric, achromatic, and spherical PCX lenses in different situations reveals the ideal use cases for each type of lens.

View Now

Understanding Optical Specifications

Do you want to know more about the importance of optical specifications? Learn the different types of specifications and their impact on your system at Edmund Optics.

View Now

NIR (Near Infrared)

View Now

VIS/NIR Coating

View Now

The Correct Material for Infrared (IR) Applications

Using an Infrared Application? Discover the importance of choosing the right material and comparisons of each at Edmund Optics.

View Now

Infrared (IR) Spectrum

View Now

SAG Calculator

View Now

Future of Spherical Lenses

Traditional spherical lenses are evolving due to the increasing demands of applications. Learn about the future of spherical lenses at Edmund Optics.

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UV vs. IR Grade Fused Silica

UV grade fused silica is ideal for UV and visible applications, but IR grade fused silica has better transmission in the IR due to a lack of OH- impurities.

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Hyperspectral & Multispectral Imaging – TRENDING IN OPTICS: EPISODE 7

Hyperspectral and multispectral imaging are imaging technologies that capture information from a broader portion of the electromagnetic spectrum.

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You offer many substrates for UV and IR applications. How do I know which is best for me?

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Edge-Blackening

Have a question about Edge-Blackening? Find more information on stray light, measuring BRDF, and more at Edmund Optics.

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Geometrical Optics 101: Paraxial Ray Tracing Calculations

Do you use ray tracing on a regular basis? Learn more about the calculations aspect, along with steps and software at Edmund Optics.

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Optics Application Examples

Looking for application examples? Find examples for Detector Systems, Selecting the Right Lens, and Building a Projection System at Edmund Optics.

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Understanding Optical Lens Geometries

Optical lens geometries control light in different ways. Learn about Snell's Law of Refraction, lens terminology and geometries at Edmund Optics.

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Precision Tolerances for Spherical Lenses

Optical lenses require very precise tolerances. Learn more about tolerances for spherical lenses at Edmund Optics.

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Keys to Cost Effective Optical Design and Tolerancing

Are you looking for ways to make cost effective optical designs? Find more information on selecting specifications and using tolerancing schemes at Edmund Optics.

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How do I clean my lenses?

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Is it possible to find Plano-Concave (PCV) or Double Concave (DCV) lenses where the diameter is greater than the focal length?

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How does reversing the orientation of a PCX lens affect the EFL and BFL in a setup?

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Double-Concave (DCV) Lens

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Double-Convex (DCX) Lens

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Meniscus Lens

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Plano-Concave (PCV) Lens

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Plano-Convex (PCX) Lens

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Advantages of Using Meniscus Lenses in Infrared Applications

Meniscus lenses offer superior performance compared to plano convex lenses in IR applications. Find out the benefits of using a meniscus lens at Edmund Optics.

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How to Design your own Beam Expander Using Stock Optics

Are standard beam expanders not meeting your application requirements? Learn how to design your own beam expander using stock optics at Edmund Optics.

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Rapid Optical Prototyping

Quickly Respond to Collapsing Product Lifecycles

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Modifying Stock Optics Tip #3: Turn A Sphere Into An Asphere

Join Andrew Fisher, Manufacturing R&D Engineer at Edmund Optics, as he discusses some tips for modifying stock optical components to fit your application's needs.

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I am looking to prototype an illumination system. My objective is to use a small halogen filament bulb and end up with a beam of light. What would be the best lens or lens combination to give me this projected spot of light?

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What is the difference between the effective focal length and the back focal length?

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What are the benefits of aspheric lenses compared to standard singlet lenses?

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Back Focal Length (BFL)

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Field Curvature

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Sag

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Optical Glass

Choosing the right optical glass is important. Find out factors and properties on how to select the right optical glass at Edmund Optics.

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Aberrations

Need help understanding aberration theory? Learn about a few fundamental concepts to help clarify your understanding at Edmund Optics.

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The Airy Disk and Diffraction Limit

The diffraction pattern caused when light passes through an aperture is called the Airy Disk. Find out how the Airy Disk can impact your image at Edmund Optics.

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What is the difference between an inked lens and a non-inked one?

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If I want to design with your lenses and lens assemblies, how do I get the information that I need?

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Now that I have chosen my lens, how do I mount it?

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Center Thickness (CT)

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Chromatic Focal Shift

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Conjugate Distance

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Épaisseur de bord

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Distance focale effective (EFL)

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Finite/Finite Conjugate

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Power

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Singlet Lens

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Modifying Stock Optics Tip #4: Add A Coating To A Stock Lens

Join Andrew Fisher, Manufacturing R&D Engineer at Edmund Optics, as he discusses some tips for modifying stock optical components to fit your application's needs.

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How to Determine Magnification of an Optical Lens Setup

When doing basic imaging, how do you determine the magnification an optical lens will provide?

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Understanding Collimation to Determine Optical Lens Focal Length

Collimated light occurs when light rays travel parallel to each other.

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How to Form an Image with an Optical Lens Setup

Although a common misconception, individual optical lenses do not always form an image when the object plane is placed a focal length away from the lens.

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Irregularity

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Radius of Curvature

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BBAR Coating

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Diopter

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Understanding Surface Quality Specifications

The surface quality of optical components the scattering off of its surface, which is especially important in laser optics applications.

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Anti-Reflection (AR) Coating

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Bevel

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Seamed Edge

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Introduction to Basic Ray Optics

An understanding of refraction and basic ray optics is a critical foundation for understanding more complicated optical concepts and technologies.

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Surface Flatness

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Transmission

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How do I clean my optics?

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Integration of Optical Systems

Are you looking to use integration in your next system? Find out more about integrating in both imaging and non-imaging applications at Edmund Optics.

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Stock and Custom Optics Manufacturing Capabilities

Edmund Optics is a global stock and custom optics manufacturing company with in house optical designers and on-site metrology and environmental testing.

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Edmund Optics Global Manufacturing Facilities

Edmund Optics® (EO) manufactures millions of precision optical components and subassemblies every year in our 5 global manufacturing facilities.

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Metrology at Edmund Optics: Measuring as a Key Component of Manufacturing

Learn about the metrology that Edmund Optics® uses to guarantee the quality of all optical components and assemblies.

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Clear Aperture (CA)

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Refraction

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Surface Quality

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25mm Diameter x -50 FL, VIS-NIR, Inked, Plano-Concave Lens

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Optical Properties

Regulatory Compliance

Product Details

Technical Information

Accessories

Coating Curves

Related Products

Imaging Lens Selector

Frequently Purchased Together

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Resources

Anti-Reflection (AR) Coatings

An Introduction to Optical Coatings

Lens Geometry Performance Comparison

Understanding Optical Specifications

NIR (Near Infrared)

VIS/NIR Coating

The Correct Material for Infrared (IR) Applications

Infrared (IR) Spectrum

SAG Calculator

Future of Spherical Lenses

UV vs. IR Grade Fused Silica

Hyperspectral & Multispectral Imaging – TRENDING IN OPTICS: EPISODE 7

You offer many substrates for UV and IR applications. How do I know which is best for me?

Edge-Blackening

Geometrical Optics 101: Paraxial Ray Tracing Calculations

Optics Application Examples

Understanding Optical Lens Geometries

Precision Tolerances for Spherical Lenses

Keys to Cost Effective Optical Design and Tolerancing

How do I clean my lenses?

Is it possible to find Plano-Concave (PCV) or Double Concave (DCV) lenses where the diameter is greater than the focal length?

How does reversing the orientation of a PCX lens affect the EFL and BFL in a setup?

Double-Concave (DCV) Lens

Double-Convex (DCX) Lens

Meniscus Lens

Plano-Concave (PCV) Lens

Plano-Convex (PCX) Lens

Advantages of Using Meniscus Lenses in Infrared Applications

How to Design your own Beam Expander Using Stock Optics

Rapid Optical Prototyping

Modifying Stock Optics Tip #3: Turn A Sphere Into An Asphere

I am looking to prototype an illumination system. My objective is to use a small halogen filament bulb and end up with a beam of light. What would be the best lens or lens combination to give me this projected spot of light?

What is the difference between the effective focal length and the back focal length?

What are the benefits of aspheric lenses compared to standard singlet lenses?

Back Focal Length (BFL)

Field Curvature

Sag

Optical Glass

Aberrations

The Airy Disk and Diffraction Limit

What is the difference between an inked lens and a non-inked one?

If I want to design with your lenses and lens assemblies, how do I get the information that I need?

Now that I have chosen my lens, how do I mount it?

Center Thickness (CT)

Chromatic Focal Shift

Conjugate Distance

Épaisseur de bord

Distance focale effective (EFL)

Finite/Finite Conjugate

Power

Singlet Lens

Modifying Stock Optics Tip #4: Add A Coating To A Stock Lens

How to Determine Magnification of an Optical Lens Setup

Understanding Collimation to Determine Optical Lens Focal Length

How to Form an Image with an Optical Lens Setup

Irregularity

Radius of Curvature

BBAR Coating

Diopter

Understanding Surface Quality Specifications

Anti-Reflection (AR) Coating

Bevel

Seamed Edge

Introduction to Basic Ray Optics