38results about How to "Realize the auto focus function" patented technology

The invention discloses an ultra-thin varifocal optical system with low cost, simple process and very low temperature drift, which comprises a photosensitive chip, a first lens group, a second lens group and a third lens group, wherein the distance between the first lens group and the second lens group gradually increases during the change from short focus to long focus; the distance between the second lens group and the third lens group gradually decreases during the change from short focus to long focus; one eyeglass of the third lens group adopts a non-spherical lens which can greatly improve the resolving capability level and shorten the thickness of the third lens group, a diaphragm is arranged between the second lens group and the third lens group, and a fourth lens group is arranged behind the third lens group. The invention has the characteristics of low cost, ultra-thin structure, simple process, very low temperature shift, and the like, and can reach 28mm wide angle and below 7 times zoom ratio.

A multifunctional surface evidence image flattener in the field of sampling technology, which automatically rotates and unfolds the object to be tested by rotating the stage, and the image control system sends a completion signal to the computer after unfolding, and the computer controls the CCD digital imaging system and lighting respectively. Combined light source opening and closing, control the lifting mechanism to adjust the height of the CCD digital imaging system and lighting combined light source, control the horizontal movement mechanism to adjust the horizontal position of the rotating stage, and control the rotating motor to adjust the movement of the self-adjusting arm for fixing Object, adjust the rotation speed of the rotating stage, so that the object to be measured completes the rotation of several angles on the rotating stage, and the CCD digital imaging system obtains image information at various angles on the surface of the object to be measured, and the image information is transmitted to the image control system , carry out data processing and integrate the pictures. The invention realizes the acquisition of plane image information from the curved surface through the automatic rotation scanning of the rotating stage and corresponding image processing software.

The invention discloses an image change automatic sensing focusing method for a microscopic camera, comprising the following steps: defining various scene states according to the change state of image brightness and image evaluation function value; monitoring the image brightness and image evaluation function of the current scene The real-time changes of the value, according to the real-time changes of the image brightness and the image evaluation function value, determine the scene state of the current scene, and adopt the focus monitoring strategy corresponding to the scene state according to the scene state, and the focus monitoring strategy includes: waiting for the image The brightness and / or image evaluation function value returns to stability, and enters a single focusing process; performs a single focusing process based on the hill-climbing search method to determine the best focusing position. The image change automatic sensing focusing method can automatically adopt different focusing strategies according to different focusing scenes, so as to improve focusing accuracy.

The embodiments of the invention relate to automatic focusing methods and apparatus suitable for use in digital imaging devices. The proposed methods and apparatus evaluate the focus condition of the optical system by evaluating the digitized image, without requiring additional hardware besides the digital image-capture signal flow path. A method for computing the appropriate direction and magnitude of optical system adjustment, based on the evaluated focus condition, is provided. The computed quantities are communicated to the lens driving apparatus to reposition and adjust the optical system and to incrementally obtain a better focus. Upon reaching a desired focus quality, the device is prevented from controlling the lens driving apparatus.