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VIS-NIR Coated Double-Concave (DCV) Lenses

Double Concave Lenses are used in beam expansion, image reduction, or light projection applications. These lenses are also ideal for expanding the focal length of an optical system. Double Concave Lenses, which have two concave surfaces, are Optical Lenses with negative focal lengths. Uni-Optics offers Double Concave lenses with a variety of coating options.
  • product origin:

  • shipping port:

    Fuzhou China
  • lead time:

    4 working weeks
  • payment:

    T/T Payment, Western Union
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  • description

1. What is Biconcave lens?

Double Concave lenses(biconcave lens) are manufactured with two concave surfaces to provide a negative focal length. The lens is also called a negative or diverging lens.

2.What is biconcave lens used for?

These lenses are normally used in applications that require to expand light beams or to increase focal lengths. Such as Beam Expanders, Projection lenses, viewers, Medical Ophthalmic Detection... and so on.

3. What can UNI Optics do?

UNI Optics as a developing and responsible optical component & assembly manufacturers from China, produces high quality Biconvex lenses out of many variations of optical glass, fused silica, crystal and Infrared materials, and with the aid of the cutting-edge thin film technology.

Coatings such as Broadband AR or V-AR can be applied to these spherical lenses to provide added performance.


double concave lenses  double concave lenses

Material:     Optical glass/Fused Silica
Design wavelength:    546.1nm
Diameter tolerance:    +0/-0.05mm
Focal tolerance:    +/-2%
Surface quality :    40-20 S/D 
Centration:    1 arcmin 
Surface flatness:     N=3 △N=0.5 
Clear aperture:    90%
Bevel:     Protective
Coating    Optional
Single layer MgF2
Multiple layers BBAR coating
Designed for 0° Angle of Incidence

Part No. Material F(mm) Φ(mm) R1=R2(mm) Tc(mm) Te(mm) Fb(mm)
ULDV010010 BK7 -10.0 10.0 10.7 2.0 4.5 -10.6
ULDV015127 BK7 -15.0 12.7 15.88 2.0 4.6 -15.6
ULDV020127 BK7 -20.0 12.7 21.07 2.0 4.0 -20.6
ULDV025127 BK7 -25.0 12.7 26.25 2.0 3.6 -25.7
ULDV030127 BK7 -30.0 12.7 31.44 2.0 3.3 -30.7
ULDV040127 BK7 -40.0 12.7 41.8 2.0 3.0 -40.7
ULDV050127 BK7 -50.0 12.7 52.17 2.0 2.8 -50.7
ULDV025025 BK7 -25.0 25.0 26.25 2.0 8.6 -25.7
ULDV035254 BK7 -35.0 25.4 36.62 2.0 6.5 -35.7
ULDV050254 BK7 -50.0 25.4 52.17 2.0 5.1 -50.7
ULDV075254 BK7 -75.0 25.4 78.09 2.0 4.1 -75.7
ULDV100254 BK7 -100.0 25.4 104 2.0 3.6 -100.7
ULDV150254 BK7 -150.0 25.4 155.830 2.0 3.0 -150.70
ULDV200254 BK7 -200.0 25.4 207.660 2.0 2.8 -200.70
ULDV250254 BK7 -250.0 25.4 259.490 2.0 2.6 -250.70
ULDV300254 BK7 -300.0 25.4 311.320 2.0 2.5 -300.70
ULDV050038 BK7 -50.0 38.0 52.340 3.0 10.1 -51.00
ULDV100038 BK7 -100.0 38.0 104.170 3.0 6.5 -101.10
ULDV150038 BK7 -150.0 38.0 156.000 3.0 5.3 -151.00
ULDV200038 BK7 -200.0 38.0 207.830 3.0 4.7 -201.00
ULDV500038 BK7 -500.0 38.0 518.810 3.0 3.7 -501.00
ULDV100050 BK7 -100.0 50.0 104.170 3.0 9.1 -101.00
ULDV150050 BK7 -150.0 50.0 156.000 3.0 7.0 -151.00
ULDV200050 BK7 -200.0 50.0 207.830 3.0 6.0 -201.00
ULDV250050 BK7 -250.0 50.0 259.660 3.0 5.4 -251.00
ULDV400050 BK7 -400.0 50.0 415.150 3.0 4.5 -401.00
ULDV500050 BK7 -500.0 50.0 518.820 3.0 4.2 -501.00
JLDV015127 JGS1 -15.0 12.7 14.110 2.0 5.0 -15.70
JLDV020127 JGS1 -20.0 12.7 18.710 2.0 4.2 -20.70
JLDV030127 JGS1 -30.0 12.7 27.920 2.0 3.5 -30.70
JLDV025254 JGS1 -25.0 25.4 23.320 2.0 9.5 -25.70
JLDV050254 JGS1 -50.0 25.4 46.320 2.0 5.6 -50.70
JLDV100254 JGS1 -100.0 25.4 92.330 2.0 3.8 -100.70
JLDV050038 JGS1 -50.0 38.0 46.480 3.0 11.1 -51.00
JLDV100038 JGS1 -100.0 38.0 92.490 3.0 6.9 -101.00
JLDV150038 JGS1 -150.0 38.0 138.500 3.0 5.6 -151.00
JLDV200038 JGS1 -200.0 38.0 184.500 3.0 5.0 -201.00

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Product Features:

· Developed for 32mm big frame sensor

· Large Aperture, upto F2.4
· High relative illumination
· Lens for 2K, 4K, 8K line scan camera
· Excellent optical performance, uniform imaging of center and edge
· Developed for 1" image format
· Wavelength: 900-1700nm
· Large Aperture, upto F1.4
· Compact and lightweight design
Custom Truncated Doublet and Singlet Lenses
Custom Truncated Doublet and Singlet Lenses

Custom Truncated Doublet and Singlet Lenses from UNI Optics

We offer an extensive custom truncated doublet lens service. With our 30 year heritage of experience in the industry means we can always find the right product and specification for you, whether you require exotic materials, or exceptionally tight tolerances, we are confident in our ability to supply to your complete satisfaction. The table below is a brief overview of our doublet lens  and is not an exhaustive list. If your individual requirements are not met, then please contact our technical sales team who will be happy to and is n’t an exhaustive list. If your individual requirements are not met, then please contact our technical sales team who will be happy to advise.

Typical Specifications:

Typical materials: Flint (N/F2) and Crown (BK7)
                             Flint (SF6) and Crown (N-LAK22)
                             UV & IR materials on request
Diameter: 3mm to 200mm+
Focal length: 3mm to 1000mm+
Centration: < 3 arcseconds
Surface figure: < 0.1 fringe
Surface quality: < 10/5 Scratch/dig
Coating options: Single layer and BBAR coatings for UV/VIS/NIR with R.avg.<0.25%

More information on the achievable specifications for your individual application can be found by contacting our technical sales team. 

Laser Windows
High Power Laser Line Windows

1、What are laser windows?

Laser Protect Windows(Laser protective glass, protective filters or welding protective windows) are used to save for the high cost of laser optics.

2、What are laser windows used for?

These windows are normally used in applications like laser cutting, laser welding machine, they are used for avoiding the high-precision laser optics damage by material splashes.

3、The key features of UNI Optics' Laser Windows

High Transmission

High Damage Threshold

Low Scatter

Low Absorption

Excellent Film Density

Excellent Environmental Stability

Laser Windows   Laser Windows

Typical Specifications:


Dimension: 4mm-80mm, round or square

Material: BK7, Fused Silica, ZnSe...etc

Surface quality: 10/5

Surface flatness: Lambda/10@632.8nm

Parallelism: 30’’

Roughness: 3A

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