Astronomical telescope

Astronomical telescope

Compound optical system, afocal in normal adjustment, consisting of a positive objective element or group and a positive ocular element or group forming a magnified, inverted image.

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Part of Speech: noun
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Industry/Domain: Eyewear
Category: Optometry
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Related terms

astronomical telescope

Eyewear; Optometry

Compound optical system, afocal in normal adjustment, consisting of a positive objective element or group and a positive ocular element or group forming a magnified, inverted ...

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To drive together so that one slides into the another like the sections of a spy-glass.

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ophthalmoscope

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pantoscopic angle

Eyewear; Optometry

1. Angle in the vertical plane between the optical axis of a spectacle lens and the visual axis of the eye in the primary position, usually taken to be the horizontal. 2. Angle ...