All About Optical Systems and Lens Technologies
What Problems Do Spherical Lenses Have?

What Problems Do Spherical Lenses Have?

  Lenses come in a variety of shapes, but the most popular of them all is the spherical lens. It is a lens in which both surfaces are spherical. Despite its popularity, spherical lenses inevitably have a problem called “aberration,” which causes...
What kind of shape of lenses TOYOTEC is able to make ?

What kind of shape of lenses TOYOTEC is able to make ?

TOYOTEC, which operates an optical design technology navigator, offers variety of shapes of lenses such as aspherical lenses, free-form shape lenses, f-theta lenses, cylindrical lenses, toroidal lenses, prism lenses, Fresnel lenses, ROE lenses, collimator lenses,...
Is coating on lenses possible ?

Is coating on lenses possible ?

Yes, TOYOTEC, which operates the Optical Design Technology Navigator, can coat on lenses. In addition to the AR (anti-reflection) coating and metal reflection mirror coating (total reflection, aluminum and copper) commonly used for basic optical products, TOYOTEC can...
(RDL) What is the peripheral illumination ration ?

(RDL) What is the peripheral illumination ration ?

RDL peripheral illumination ratios are as follows Horizontal: 58% Diagonal: 45% In the central projection method used by the RDL, the vignetting ratio decreases according to the cosine fourth law. The vignetting ratio is inversely proportional to the distortion...
(RDL) What is the peripheral illumination ration ?

(RDL) How to handle it when RDL gets dirty?

Please handle a product that has been soiled in the same way as a typical lens product. For example, it’s easy to understand if you think of it as the same as interchangeable lens for an SLR camera.   The following is how to handle the product and what to...