It is well-known that the magnification of an imaging lens changes with the object distance (distance from the object to the lens). However, it is
Applications in Imaging Optics Oleophobic refers to the physical property of a molecule that repels oil. Fluorocarbons are deposited to the substrate to create a
Many applications require that CMOS or CCD imaging lenses be optimized for a finite object, that is, for an object distance closer than “infinity.” The
Lens distortion is a commonly used term in the general specification of lenses. The classic, textbook definition of distortion includes barrel and pincushion type distortions.
One modification that is commonly requested by our Customers is changing the F/# of a standard lens. The most common reason to stop down a
Super wide-angle lenses and fisheye lenses have pronounced barrel distortion. When viewing a flat object, off-axis features are “squeezed” significantly relative to the on-axis ones.
Certain applications require a broad spectral operating range and customers oftentimes inquire whether a lens can perform “well” out to their wavelength of interest. These
“Scaling’ refers to a method where a known lens design is proportionally enlarged or reduced geometrically to meet a different image size requirement from what
At Sunex, we get the above question frequently, but the answer is not straightforward. Specifying an operating temperature range for a lens can be tricky,
Following up on the article Optical Tolerances – Part 1, Part 2 discusses the quantitative measure of image quality. The modulation transfer function (MTF) is
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