Definition of Cassegrain telescope in English:

Cassegrain telescope

nounˈkasɪɡreɪnˌkasəɡrān ˈteləskōp

A reflecting telescope in which light reflected from a convex secondary mirror passes through a hole in the primary mirror.
Example sentencesExamples
- The tube length is very long compared to a Cassegrain telescope of the same effective focal length.
- Visitors can also see the University Observatory, which houses a 14 inch Schmidt Cassegrain telescope with a cooled CCD (Charge Couple Device) camera.
- A correcting plate (a lens) was added in 1930 by the Estonian astronomer and lens-maker Bernard Schmidt, creating the Schmidt-Cassegrain telescope which minimized the spherical aberration of the Cassegrain telescope.
- Easy portability and precision optics are hallmarks of Cassegrain telescopes, and Orion has some of the finest.
- In an all-reflective Cassegrain telescope (usually called a Classical Cassegrain), there is no corrector lens.

Origin

Late 19th century: named after N. Cassegrain (1625–1712), the French astronomer who devised it.

Definition of Cassegrain telescope in US English:

Cassegrain telescope

nounˌkasəɡrān ˈteləskōp

A reflecting telescope in which light reflected from a convex secondary mirror passes through a hole in the primary mirror.
Example sentencesExamples
- Visitors can also see the University Observatory, which houses a 14 inch Schmidt Cassegrain telescope with a cooled CCD (Charge Couple Device) camera.
- Easy portability and precision optics are hallmarks of Cassegrain telescopes, and Orion has some of the finest.
- In an all-reflective Cassegrain telescope (usually called a Classical Cassegrain), there is no corrector lens.
- The tube length is very long compared to a Cassegrain telescope of the same effective focal length.
- A correcting plate (a lens) was added in 1930 by the Estonian astronomer and lens-maker Bernard Schmidt, creating the Schmidt-Cassegrain telescope which minimized the spherical aberration of the Cassegrain telescope.

Origin

Late 19th century: named after N. Cassegrain (1625–1712), the French astronomer who devised it.

单词	Cassegrain telescope
释义	Definition of Cassegrain telescope in English: Cassegrain telescope nounˈkasɪɡreɪnˌkasəɡrān ˈteləskōp A reflecting telescope in which light reflected from a convex secondary mirror passes through a hole in the primary mirror. Example sentencesExamples The tube length is very long compared to a Cassegrain telescope of the same effective focal length. Visitors can also see the University Observatory, which houses a 14 inch Schmidt Cassegrain telescope with a cooled CCD (Charge Couple Device) camera. A correcting plate (a lens) was added in 1930 by the Estonian astronomer and lens-maker Bernard Schmidt, creating the Schmidt-Cassegrain telescope which minimized the spherical aberration of the Cassegrain telescope. Easy portability and precision optics are hallmarks of Cassegrain telescopes, and Orion has some of the finest. In an all-reflective Cassegrain telescope (usually called a Classical Cassegrain), there is no corrector lens. Origin Late 19th century: named after N. Cassegrain (1625–1712), the French astronomer who devised it. Definition of Cassegrain telescope in US English: Cassegrain telescope nounˌkasəɡrān ˈteləskōp A reflecting telescope in which light reflected from a convex secondary mirror passes through a hole in the primary mirror. Example sentencesExamples Visitors can also see the University Observatory, which houses a 14 inch Schmidt Cassegrain telescope with a cooled CCD (Charge Couple Device) camera. Easy portability and precision optics are hallmarks of Cassegrain telescopes, and Orion has some of the finest. In an all-reflective Cassegrain telescope (usually called a Classical Cassegrain), there is no corrector lens. The tube length is very long compared to a Cassegrain telescope of the same effective focal length. A correcting plate (a lens) was added in 1930 by the Estonian astronomer and lens-maker Bernard Schmidt, creating the Schmidt-Cassegrain telescope which minimized the spherical aberration of the Cassegrain telescope. Origin Late 19th century: named after N. Cassegrain (1625–1712), the French astronomer who devised it.
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