Internal red dot sight

Abstract

An internal red dot sight includes an objective lens formed of a convex lens, a planar eye lens set in a tilt angle relative to the objective lens and facing the concave surface of the objective lens, and a light emitting device set in between the planar eye lens and the objective lens and controlled to emit a point light source onto the eye lens for enabling the eye lens to reflect the point light source and to further produce a virtual point light source on the focal point of the objective lens for viewing by the user.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a sight for use in a gun or the like to guide the eyes and more particularly, to an internal red dot sight, which projects a virtual point light source onto the objective lens, simulating the parallel emission of a point light source from a remote site and, which employs coating techniques to control the percentage of red light reflection, achieving the objects of shortening the length of the internal red dot sight, increasing the size of the objective lens, reducing the manufacturing cost of the internal red dot sight, and improving the projection precision of the light source. [0003] 2. Description of the Related Art [0004] Conventional sights for use in guns to guide the eyes include two types, namely, the internal red dot type and the external red dot type. In a battle, the sight helps the fighter to achieve fast target acquisition. A regular external red dot sight uses a laser p...

AI Technical Summary

Benefits of technology

[0009] The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide an internal red dot sight, which improves the projection precision of the light source. It is another object of the present invention to provide an internal red dot sight, which greatly shortens the device length, maximizes the size of the objective lens, and reduces the product cost.

[0010] To achieve these and other objects of the present invention, the internal red dot sight comprises an objective lens formed of a convex lens, a planar eye lens set in a tilt angle relative to the objective lens and facing the concave surface of the objective lens, and a light emitting device set in between the planar eye lens and the objective lens and controlled to emit a point light source onto the eye lens for enabling the eye lens to reflect the point light source and to further produce a virtual point light source on the focal point of the objective lens for viewing by the user. Further, by means of employing coating techniques to the eye lens and the objective lens, the reflected percentage of the red light of the point light source is controlled.

Problems solved by technology

Further, when the intensity of the ambient light is high, the user may be unable to identify the red dot on the target.

This design is functional, however it still has drawbacks.

Further, this design uses a big number of lenses, resulting in a high cost.

If the internal red dot sight falls to the ground accidentally, the angle of reflection of the laser beam will be biased, resulting in a focusing failure.

In this case, the laser beam may injure the user's eye.

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