By combining it with a convex lens, it is also possible to arrange the optical system!
A "concave lens" has a negative focal length and is used for image reduction and divergence applications. When combined with a convex lens, it is also possible to arrange the optical system to extend the working distance or expand the LD beam. The general usage method is the same as that of a plano-convex lens, using the concave side to face the parallel light beam. 【Specifications】 ■ Material: BK-7 ■ Refractive index: 1.51680/nd, 1.51872/ne ■ Design wavelength: 587.6nm (d line) ■ Chamfering (45°) with protective chamfer ・φ5: 0.1mm ・φ10 to φ100: 0.2mm *For more details, please download the PDF or feel free to contact us.
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basic information
[Tolerance] ■ Diameter: +0mm/-0.1mm ■ Center thickness: ±0.2mm ■ Focal length: ±2% ■ Eccentricity: Within 3 minutes ■ Surface quality: MIL60-40 *For more details, please download the PDF or feel free to contact us.
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Applications/Examples of results
【Main Uses】 ■ Autocollimator ■ Light detection ■ Laser collimation ■ Infinity-corrected objective lens, etc. *For more details, please download the PDF or feel free to contact us.
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Company information
This is an optical manufacturer with over 110 years of history, originating from Sugita Glass Instrument Store founded by Tōtarō Sugita in 1906 (Meiji 39). The main business is the research and manufacturing of glass, and for many years, it has supplied a wide variety of glass products to various fields. In 1982, the company changed its name to Sugito Co., Ltd. and promoted business expansion, designing, developing, manufacturing, and selling optical elements such as optical lenses and prisms, glass products like special lenses and magnifying glasses, as well as optical products and components including macro zoom lenses, microscopes, various scopes, and inspection equipment. Additionally, in 1993, a factory was newly established in Thailand to enhance the production capacity of glass products and lenses. The company keeps standard optical elements and lens systems in stock at all times and can sell from a single unit. It also handles the design, development, and manufacturing of optical elements and lens systems according to customer requests, so please feel free to inquire.
![Concave lenses [Available in various sizes, substrates, and coatings!]](https://image.mono.ipros.com/public/product/image/fe5/2000418465/IPROS6932304568819659667.jpg?w=280&h=280)
![Biconcave lenses [Available in various sizes, substrates, and coatings!]](https://image.mono.ipros.com/public/product/image/cb4/2000418518/IPROS3999118970986523384.jpg?w=280&h=280)
