An adjustable focus eyepiece for microdisplay

Abstract

The invention discloses a focus-adjustable eyepiece for a microdisplay, which is composed of an eyepiece barrel installed in an eyepiece upper case and an eyepiece lower case, a microdisplay, a convex lens fixing seat, a convex lens and a hand wheel. Column, the column is covered with a spring, there is a travel groove on the wall of the eyepiece tube, the convex lens holder is provided with a positioning hole matching the column of the eyepiece tube, and the surface of the convex lens holder is provided with a stroke matching the stroke groove on the eyepiece tube The inner surface of the hand wheel is provided with an internal thread, and the stroke column on the convex lens fixing seat extends into the internal thread. The invention has the ability to use the stroke column on the eyepiece fixing seat to cooperate with the internal thread in the focusing handwheel to adjust the focus of the eyepiece. , Simple structure, convenient operation and low cost.

Description

technical field [0001] The invention belongs to the technical field of microdisplays, in particular to a focus-adjustable eyepiece for microdisplays. Background technique [0002] Microdisplay is a popular product in the field of display in recent years. It is used in virtual reality and is often used in glasses-type and head-mounted display devices. Because people's eyesights are different, and people need to directly watch the images of the microdisplay, they are not suitable for people with severe myopia and hyperopia. Although some of the eyepieces used in current telescopes and microscopes already have focusing functions and can be used by people with different visions, their structures are complicated, their production processes are complicated, and their cost is high. They are not suitable for use with microdisplays, and they are heavy. Not suitable for head-worn use. For example, the focal length adjustment mechanism of the traditional telescope eyepiece is compose...

AI Technical Summary

Problems solved by technology

Although some of the eyepieces used in current telescopes and microscopes already have focusing functions and can be used by people with different visions, their structures are complicated, their production processes are complicated, and their cost is high. They are not suitable for use with microdisplays, and they are heavy. Not suitable for head wear

For example, the focal length adjustment mechanism of the traditional telescope eyepiece is composed of an eyepiece tube, an eyepiece holder, a focusing seat and a guide pin. When the focusing seat rotates, the chute drives the guide pin to move back and forth in a straight line, so that the eyepiece can be stretched and adjusted back and forth. Since the guide pin and the focusing seat are both processed by metal parts, and the two are in precise transmission cooperation, the The guide pin and focusing seat have high processing precision requirements, high processing precision requirements, high production cost, complicated process, and low production efficiency; in its improved products, the eyepiece seat is fixed on the telescope body, and the lower part of the eyepiece tube is connected to the The eyepiece base forms a thread transmission fit, the upper part of the eyepiece barrel forms a gear transmission fit with the focusing base, and the pin cooperates with the arc-shaped guide groove on the focus base. Although the improvement can reduce production difficulty and cost, it still uses gears, threads The close fit between them still requires high machining accuracy and the manufacturability is still complicated.

Images