Internal red dot sight

Inactive Publication Date: 2007-06-07
CHENG LI DER +1
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 i

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, res

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Internal red dot sight
  • Internal red dot sight
  • Internal red dot sight

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Referring to FIGS. 1 and 2, an internal red dot sight 4 is shown comprised of an eye lens 1, an objective lens 2, and a light emitting device 3 adapted to emit light in between the eye lens 1 and the objective lens 2. The eye lens 1 is a planar lens. The objective lens 2 is a concave lens. The eye lens 1 is set in a tilt angle relative to the objective lens 2. When the light emitting device 3 is operated to emit light toward the eye lens 1, the eye lens 1 reflects a point light source of the light emitting device 3, thereby forming a virtual point light source on an major axis of the objective lens 2 subject to the law that incident angle=angle of reflection. At this time, this distance between the point light source of the light emitting device 3 and the eye lens 1 is equal to the distance between the virtual point light source and the eye lens 1. Therefore, the virtual point light source is allocated at a focal point F of the objective lens 2, and a light ray is projected t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F41G1/00
CPCF41G1/345
Inventor CHENG, LI-DERLEE, YI-RONG
Owner CHENG LI DER
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap