Cylindrical lens

Production of cylindrical lenses

Cylindrical lens from onchina is among top-level in terms of surface quality, irregularity and dimension tolerance. It also provides the high precision, special shapes and specifications designed by customers.

tonchina design and manufacture cylindrical lenses(include round versions), plano-convex, plano-concave, acylindrical lenses and cylindrical achromatic doublets. Achromatic cylinder lenses provide additional color correction by minimizing chromatic aberration. Hydrid acylinder lenses are typically used for color correction, in addition to minimizing srical aberration.

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Our precision cylindrical lenses are produced to meet the demanding requirements of laser electro-optic applications. They are manufactured from fine annealed optical glass or other materials designated by customers and are polished to tight tolerances to ensure minimum wavefront distortion. Tight surface quality tolerances minimize scatter and unwanted diffraction effects.

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Optical coating

By virtue of over 20 years of experience in designing and operation of optical coating technique, tonchina uses its vacuum coating equipment imported from Germany or Japan as well as domestic brand to supply a very wide of coating service for customers worldwide.

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Broadband visible antireflection coating

Our broadband multilayer antireflection coating markedly improves the transmission efficiency of these lenses by reducing surface reflections over a 430-700nm wavelength range. This AR coating performs effectively for multiple visible wavelengths and tunable lasers eliminating the need for several sets of optics.

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Laser V-coating from tonchina offers the lowest reflectance at 1064nm for maximum transmission while maintaining high durability and exnt damage resistance. Valuable laser energy is efficiently transmitted through the plano-convex lens rather than lost to surface reflection and scattering. The trade off to its superior performance is the minimal laser length range.

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Lenses made by tonchina have especially been suited for sensitive laser applications, including laser scanning, diode laser beam shaping. Additional applications include focusing light into a thin optical metrology or collecting light in spectroscopy systems. They can also be used to expand the output of a laser diode into a symmetrical beam.

General comments on manufacturing limits for tonchina

This represents a general list of soft limits and is intended for reference only.

As requirements move closer to a min or max shown, fabrication becomes more difficult.

Certain combinations are attainable, with extra significant fixturing costs, e.ge. crossed axis cylinders, cylinders/sres.

Aperture coverage is often limited by the range of diffractive nulls available.

Length is always the dimension along the plano axis and width is the dimension across the power axis.

Capabilities

Attribute      Standard level        Premium       tonchina’s Ability

Diameter(mm) Â Â Â Â Â Â +/-0.100 Â Â Â Â Â +/-0.025Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â +/-0.015

Central Thickness(mm)Â Â +/-0.150 Â Â Â Â +/-0.050Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â +/-0.015

Radius (the larger one)Â Â +/-1.0% Â Â Â Â Â +/-0.5%Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â +/-0.1%

Surface Quality      60-40         40-20        10-5

Irregularity        1/4 Lambda       1/8 Lambda      1/15 Lambda

(Plano Surface)      or 0.5fr          or 0.25fr         or 0.15fr

Irregularity         1/2 Lambda       1/4 Lambda     1/8 Lambda

(Cylindrical Surface)   or 1.0fr        or 0.5fr       or 0.25fr

Centration(arc min) Â Â Â Â Â +/-8 Â Â Â Â Â Â Â Â Â +/-3Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â +/-0.5 Â

Note

The surface quality data above is based on area of 20mm*20mm

The irregularity data shown is based on per inch in dimension L.

The data of centration is based on each 20mm in dimension L.

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