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Lenses for many applications

Lenses have many applications in range from the simple collection of the scanning of laser beams to precise imaging and image transferring. Lenses are classified as singlet, cylindrical, achromatic and ball lens according to the different applications.

Selecting the proper lens for your application requires making a number of choices. A few of the many considerations include: lens shape, conjugate ratio, f/number, transmission, wave front distortion, scattered light, anti-reflection coating, and cost.

Featured Material:

For application in the visible and infrared up to about 2.1 μm, BK7 offers excellent performance at a good value.

In the ultraviolet down to 195 nm, UV Fused Silica is a good choice.

UV Fused Silica also has excellent transmission in the visible and infrared up to about 2.1 μm, better homogeneity, and a lower coefficient of thermal expansion than BK7. CaF2 and MgF2 offer high transmission in the deep UV, and they are excellent choices for deep UV excimer laser or infrared applications.

Silicon and Germanium lenses are widely used in IR applications.

Material Transmission Range Cost Features
BK7 0.390~2.100nm Low High transmission for visible to near infrared applications, the most common optical glass.
UV Fused Silica 0.160~2.100um Moderate Excellent homogeneity and low thermal expansion, high laser damage resistance.
CaF2 0.150~9.000um High High transmission for deep UV to infrared applications.
CZ Silicon 0.120~100.0um Moderate High thermal conductivity and low density, excellent for infrared applications.
Germanium 1.900~17.00um High Excellent for infrared applications

Optical Surfaces Requirements:

The lens application drives the requirements for surface irregularity and surface quality.

Surface Irregularity
Figure Cost Applications
λ/2 Low Used where wavefront distortion is not as important as cost
λ/4 Moderate Excellent for most general laser and imaging applications where low wavefront performance must be balanced with cost
λ/8 High For laser and imaging applications requiring low wavefront distortion, especially in systems with multiple elements
Surface Quality
Scratch-Dig Cost Applications
60-40 Low Used for low power laser and imaging applications where scattered light is not as critical as cost
40-20 Moderate Excellent for laser and imaging systems with focused beams that can tolerate little scattered light
20-10 High For demanding laser and imaging systems where minimizing scattered light is critical

Antireflective Coatings:

We offer an extensive range of anti reflective coatings covering the ultraviolet, visible, near infrared, and infrared regions.

Please refer to our coatings chapter. Lenses are the most regular components that we are producing.

We can reach very high quality but still at a low price, and we are competitive against any suppliers in the world.We processes thousands of radius Testing Plate for fabricating lenses in stock.

Manufacturing Tolerances:

Tolerances Commercial quality Precision quality Manufacturing limits
Glass Quality nd ±0.001 ±0.0005 Melt controlled
vd ±0.8% ±0.3% Melt controlled
Diameter(mm) +0.00/-0.10 +0.00/-0.05 +0.00/-0.01
Center Thickness(mm) ±0.10 ±0.02 ±0.005
SAG (mm) ±0.050 ±0.025 ±0.010
Radius ±2% ±0.5% ±0.025%
EFL ±2% ±1.0% ±0.1%
Scratch-Dig 80-50 40-20 10.maj
Power (fringe) 8 3 1
Irregularity (fringe) 3 0.5 0.2
Wedge Lens (ETD, mm) 0.05 0.01 Facility controlled
Bevel <0.25mm x 45°or upon requirement No bevel
Coating Upon requirement


The general tolerance specifications above provide a guideline regarding manufacturing capabilities for optics ranging in size from 0.6-500mm.

The manufacturing limits are not absolute; tighter tolerances may be possible.

Part specific tolerances may vary depending on component size, shape, and/or material.

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