Optical Lenses
Our range of optical lenses includes plano-convex, double-convex, concave, meniscus, achromatic, and cylindrical lenses. Glass Perfection produces optical lenses to exact specifications for use in imaging, collimation, beam shaping, and focusing applications. Manufactured from BK7, fused silica, and other optical glasses, our lenses are polished to high surface quality and available with various coatings for enhanced performance.
Function
Application
Focusing
Columating
Imaging
The simple lens is a single optical element that refracts inadent light to form an image. The most common simple lens forms are Plano-convex lenses, Double-convex lenses, Plano-concave lenses and Double-concave lenses. Each lense has a certain degree of power (o)
o = (n-1)(1/R1-1/R2)
Where:
o = Lens power (=1/focal length)
n = index of refraction of the lens material
R1 = radius of surface 1 of lens
R2 = radius of surface 2 of lens
(for double-convex lenses, R2 is negative)
Lens Markers Formula
o = 1 = (n-1)(1- 1) + (n-1) t
f R1 R2 n R1R2
Where:
t=lens thickness
Types of Lenses
Plano Convex Lenses
Plano Convex Lenses
Plano-convex lenses feature one flat and one outward-curved (convex) surface, making them ideal for focusing collimated light to a point or collimating diverging light from a point source. This geometry helps reduce spherical aberration when used at finite conjugates, making them a popular choice for precision optical systems.
o: diameter
tc: centre thickness
te: edge thickness
P: principal point
f: focal length
fb: back focal point
fp: focal Point
At Glass Perfection, we commonly use plano-convex lenses as secondary focusing elements, particularly to re-focus the collimated output from our light sources. Their versatility also makes them well-suited for use in laser optics, imaging systems, and illumination setups.
We offer a wide range of plano-convex lenses in various diameters, focal lengths, and substrates, including BK7 and fused silica. Lenses can be supplied with high-quality anti-reflective (AR) coatings tailored to your wavelength requirements, ensuring optimal light transmission and system performance.
:
| Diameter Tolerence: | +0mm – 0.25mm |
| Edge/Centre Thickness Tolerence: | +/- 0.25mm |
| Edge Finish: | fine ground, beveled |
| Clear Aperture Diameter: | 80% of central diameter |
| Surface Figure: | ^/4 @ 632.8 nm |
| Surface Quality: | 60-40 scratch and dig |
| Bevel: | 0.25mm x 45 degree |
| Focal Length Tolerence: | +/-2% |
| Back Focal Lenght Tolerence | +/-2% |
BK7 grade A optical glass – n=1.5183+/-0.0005n (@546.1nm)
High purity uv grade fused silica – n=1.4608+/-0.0005 (@546.1nm)
Anti-reflection Coating Available.
To improve transmittace we can supply your lenses coated with a single layer (broad band) or multi layer (narrow band) anti-reflection coating on both sides.
Double Convex Lenses
Double Convex Lenses
Double convex lenses—also known as biconvex lenses—have two outwardly curved surfaces and are primarily used to converge light in a wide range of optical systems. They are ideal for collecting and refocusing light from a small source, or for focusing beams where optical train length is a key consideration over spot quality.
o: diameter
tc: centre thickness
te: edge thickness
P: principal point
f: focal length
fb: back focal point
fp: focal Point
At Glass Perfection, we manufacture double convex lenses with high dimensional accuracy and low wavefront distortion, ensuring dependable performance in precision optical assemblies. These lenses are commonly used in imaging, magnification, beam focusing, projection optics, and multi-element lens systems.
We offer double convex lenses in a variety of materials, diameters, and focal lengths, with custom options available to meet your exact specifications. Lenses can also be supplied with precision AR coatings to enhance light transmission across your desired wavelength range.
| Diameter Tolerence: | +0mm – 0.25mm |
| Edge/Centre Thickness Tolerence: | +/- 0.25mm |
| Edge Finish: | fine ground, beveled |
| Clear Aperture Diameter: | 80% of central diameter |
| Surface Figure: | ^/4 @ 632.8 nm |
| Surface Quality: | 60-40 scratch and dig |
| Bevel: | 0.25mm x 45 degree |
| Focal Length Tolerence: | +/-2% |
| Back Focal Lenght Tolerence | +/-2% |
BK7 grade A optical glass – n=1.5183+/-0.0005n (@546.1nm)
High purity uv grade fused silica – n=1.4608+/-0.0005 (@546.1nm)
Anti-reflection Coating Available.
To improve transmittace we can supply your lenses coated with a single layer (broad band) or multi layer (narrow band) anti-reflection coating on both sides.
Plano Concave Lenses
Plano Concave Lenses
Plano-concave lenses have one flat side and one inward curved face and negative focal lentgth. They are used for image reduction or to spread light.
o: diameter
tc: centre thickness
te: edge thickness
P: principal point
f: focal length
fb: back focal point
fp: focal Point
:
| Diameter Tolerence: | +0mm – 0.25mm |
| Edge/Centre Thickness Tolerence: | +/- 0.25mm |
| Edge Finish: | fine ground, beveled |
| Clear Aperture Diameter: | 80% of central diameter |
| Surface Figure: | ^/4 @ 632.8 nm |
| Surface Quality: | 60-40 scratch and dig |
| Bevel: | 0.25mm x 45 degree |
| Focal Length Tolerence: | +/-2% |
| Back Focal Lenght Tolerence | +/-2% |
BK7 grade A optical glass – n=1.5183+/-0.0005n (@546.1nm)
High purity uv grade fused silica – n=1.4608+/-0.0005 (@546.1nm)
Anti-reflection Coating Available.
To improve transmittace we can supply your lenses coated with a single layer (broad band) or multi layer (narrow band) anti-reflection coating on both sides.
Double Concave Lenses
Double Concave Lenses
Double-concave lenses have two inward curved sides and negative focal length. They are used for image reduction and to spread light
o: diameter
tc: centre thickness
te: edge thickness
P: principal point
f: focal length
fb: back focal point
fp: focal Point
:
Material: BK7 grade A optical glass – n=1.5183+/-0.0005n (@546.1nm) Anti-reflection Coating Available. To improve transmittace we can supply your lenses coated with a single layer (broad band) or multi layer (narrow band) anti-reflection coating on both sides. |
Meniscus Lenses
Meniscus Lenses
Positive Meniscus Lenses
Negative Meniscus Lenses
o: diameter
tc: centre thickness
te: edge thickness
P: principal point
f: focal length
fb: back focal point
fp: focal Point
| Diameter Tolerence: | +0mm – 0.25mm |
| Edge/Centre Thickness Tolerence: | +/- 0.25mm |
| Edge Finish: | fine ground, beveled |
| Clear Aperture Diameter: | 80% of central diameter |
| Surface Figure: | ^/4 @ 632.8 nm |
| Surface Quality: | 60-40 scratch and dig |
| Bevel: | 0.25mm x 45 degree |
| Focal Length Tolerence: | +/-2% |
| Back Focal Lenght Tolerence | +/-2% |
BK 7grade A optical glass – n=1.5183+/-0.0005n (@546.1nm)
High purity uv grade fused silica – n=1.4608+/-0.0005 (@546.1nm)
Anti-reflection Coating Available.
To improve transmittace we can supply your lenses coated with a single layer (broad band) or multi layer (narrow band) anti-reflection coating on both sides.
Achromatic Lenses
Achromatic Lenses
Achromatic lenses are designed to minimise chromatic aberration by combining materials with different refractive indices. They focus two or more wavelengths to the same point, making them ideal for broadband imaging and laser systems. Glass Perfection produces custom achromatic lenses in cemented or air-spaced configurations, with options for visible, UV, and IR ranges. All lenses are tested to ensure high contrast and resolution.
o: diameter
tc: centre thickness
te: edge thickness
P: principal point
f: focal length
fb: back focal point
fp: focal Point
| Diameter Tolerence: | +0mm – 0.25mm |
| Edge/Centre Thickness Tolerence: | +/- 0.25mm |
| Edge Finish: | fine ground, beveled |
| Clear Aperture Diameter: | 80% of central diameter |
| Surface Figure: | ^/4 @ 632.8 nm |
| Surface Quality: | 60-40 scratch and dig |
| Bevel: | 0.25mm x 45 degree |
| Focal Length Tolerence: | +/-2% |
| Back Focal Lenght Tolerence | +/-2% |
BK 7grade A optical glass – n=1.5183+/-0.0005n (@546.1nm)
High purity uv grade fused silica – n=1.4608+/-0.0005 (@546.1nm)
Anti-reflection Coating Available.
To improve transmittace we can supply your lenses coated with a single layer (broad band) or multi layer (narrow band) anti-reflection coating on both sides.
Cylindrical Lenses
Cylindrical Lenses
Plano-convex Cylindrical Lenses
o: diameter
tc: centre thickness
te: edge thickness
P: principal point
f: focal length
fb: back focal point
fp: focal Point
| Diameter Tolerence: | +0mm – 0.25mm |
| Edge/Centre Thickness Tolerence: | +1 – 0.25mm |
| Edge Finish: | fine ground, beveled |
| Clear Aperture Diameter: | 80% of central diameter |
| Surface Figure: | ^/4 @ 632.8 nm |
| Surface Quality: | 60-40 scratch and dig |
| Bevel: | 0.25mm x 45 degree |
| Focal Length Tolerence: | +1-2% |
| Back Focal Lenght Tolerence | +1-2% |
BK 7grade A optical glass – n=1.5183+/-0.0005n (@546.1nm)
High purity uv grade fused silica – n=1.4608+/-0.0005 (@546.1nm)
Anti-reflection Coating Available.
To improve transmittace we can supply your lenses coated with a single layer (broad band) or multi layer (narrow band) anti-reflection coating on both sides.
Ready to start your project or need more information?
Call us on 0330 133 3805
Explore Our Range
We invite you to explore our range of optical components, each designed to serve specific functions and applications:
Click on the links to learn more about each component and its specifications. If you have any questions or require assistance, please contact our team of experts.
At Glass Perfection, we combine advanced technology, expert craftsmanship, and a commitment to quality to deliver solutions that exceed expectations. Contact us today to learn more about how we can support your project.