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Telescopic field of view

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Step 1: Concept

The angular diameter of the area of sky that a telescope imagines well is called the telescope's field of view or Angle of view (ω). The field of view of a telescope is usually determined at the time of design. The field of view of a telescope is inversely proportional to the magnification, and the larger the magnification, the smaller the field of view. Different optical systems, different image qualities (caused by aberrations), different apertures, and different focal lengths determine the telescope.

2 The size of different fields of view.

The field of view of a telescope is usually expressed in terms of the observable width at one kilometer, so when we look at the telescope parameters, the field of view at one kilometer is usually expressed in terms of, for example, 128M/1000M. The field of view of a telescope is generally expressed in three ways:

1) It is directly expressed by the field of view, for example, the actual field of view: 7.3° (Note: The field of view is the field of view seen through an unadjusted telescope with the center of the objective lens as the reference point, and the Angle formed by the field of view and the reference point is called the field of view Angle. The larger the field of view, the easier it is to find the target, and the larger the magnification, the smaller the field of view.

The latest company news about the telescope field of view

2) Visible range in kilometers, for example, visual field: more than 120M/1000M. 3) Expressed in thousand yard feet, e.g. field of view: more than 120FT/1000Y.

Basis of night vision

The effect of 850nm and 940nm on the wavelength of infrared transmitting tube in the spectrum of night vision instrument