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	Physical-instument >> Goniometry Instrument with Super Aperture   Goniometry Instrument with Super Aperture Used for Measuring and Adjusting Telescope Systems 1. Typical Applications It is a parallel tube with a super aperture, used for testing the field of view of a telescope system and for calibration of the size and the deviation from the centre of the field of view of an optical instrument, such as the diffraction HUD systems which have been equipped in the air planes of Boeing 727, JAS39, F-35, F-22, etc.    2. Specification: a. Type: Y300 Focal length： 320mm Available clear objective aperture：Φ100 mm Field of view: Horizon： 2ω=30° Verticality：2ω=30° Horizon minimum scale：10 ′ Verticality minimum scale：10 ′ Size：   Φ132~Φ198×490mm Gross Weight：17.5KG Y300 b. Type: Y500 Focal length： 500mm Available clear objective aperture：Φ150 mm Field of view: Horizon：  2ω=30° Verticality：2ω=30° Horizon minimum scale：10 ′ Verticality minimum scale：10 ′ Size：   Φ350×490mm Gross Weight：35KG Y500

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