coude telescope
Noun: A coude telescope is a specific type of reflecting telescope. Its optical design is constructed so that the incoming light is redirected along the telescope's polar axis to a fixed focal point. This fixed point is typically where instruments like a plate holder or a spectrograph are permanently mounted, allowing for stable and heavy equipment to be used without moving.
The term is used in the field of astronomy and optical engineering to describe a telescope with a particular light-path configuration. It is a technical, compound noun.
Examples: * The observatory's primary instrument for high-resolution spectroscopy is a coude telescope. * Due to its fixed focus location, the coude telescope can support very heavy spectrographs that would be impractical on other designs.
- The coude focus (or Coudé focus) is the stationary focal point of this telescope design where the instrumentation is placed.
- The design is advantageous for spectroscopic observations because the instrument remains perfectly stationary, eliminating flexure and alignment issues during tracking.
- Coudé focus (noun): The fixed focal point of a coude telescope system.
- Reflecting telescope (noun): The broader category of telescopes that use mirrors to gather and focus light, which includes the coude design.
- Coudé reflector (noun): A less common but equivalent term.
- The word "coudé" is derived from the French word for "bent" or "elbow," describing the bent light path within the telescope.
- It is a specialized term not commonly used outside professional and academic contexts in astronomy.
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a reflecting telescope so constructed that the light is led to a plate holder or spectrograph
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