catadioptric system

The Cassegrain design is also used in catadioptric systems.

A catadioptric sensor is a visual sensor that contains mirrors (catoptrics) and lenses (dioptrics), a combined catadioptric system.

In 1838, the original whale oil Argand lamps and the tin mirrors were replaced by a revolving catadioptric system, manufactured by Wilkins and Company of London.

Dr. Nayar, the inventor of a 360-degree omnidirectional camera called the Omnicam, has long been interested in imaging systems that combine lenses and mirrors, called catadioptric systems.

Various types of catadioptric systems are also used in camera lenses known alternatively as catadioptric lenses (CATs), reflex lenses, or mirror lenses.

They are also used in combination with reflective elements (catadioptric systems) such as the aspherical Schmidt corrector plate used in the Schmidt cameras and the Schmidt-Cassegrain telescopes.

The biggest advantage of catadioptric systems is that because one uses mirrors to bend the light rays instead of lenses (like fish eye), the image has almost no chromatic aberrations or distortions.

Schmidt's combining of diverse optical elements (a special mirror, a diaphragm at a particular location, and a "correction plate") into a simple catadioptric system, based on reasoning from first principles, was epoch making.

Catadioptric systems are used in Imagine Spectrometers and are compact, too; however, the collimator or imager will be made up of two curved mirrors and three refracting elements, and thus, the system is very complex.

In these devices lenses are sometimes paired up with curved mirrors to make a catadioptric system where the lenses spherical aberration corrects the opposite aberration in the mirror (such as Schmidt and meniscus correctors).

Nikon was among the first to introduce what are known today as 'mirror lenses' - lenses with Catadioptric system designs, which allowed the light path to be folded and thus yielded lens designs that were more compact than the standard telephoto designs.

Moreover, chromatic aberration, a major problem with long refractive lenses, and off-axis aberration, a major problem with reflective telescopes, is almost completely eliminated by the catadioptric system, making the image they produce suitable to fill the large focal plane of a camera.

Catadioptric lens - catadioptric lenses are a form of telephoto lens but with a light path that doubles back on itself and with an objective that is a mirror combined with some form aberration correcting lens (a catadioptric system) rather than just a lens.

The Catadioptric system, where a spherical reflector is combined with a lens with the opposite spherical aberration, corrects the common optical errors of a reflector such as the Cassegrain system, making it suitable for devices that need a large aberration free focal plane (cameras).

This lens is considered to be sufficiently significant that models have been made and marketed as technological "diamonds" - "a superior example of mathematical dimension and extraordinary beauty. . . . With its magnificent series of concentric glass prisms, the light would reflect back through the central lens - a perfect example of a 'catadioptric system."