Method for utilizing effective area of image sensor

Abstract

The invention discloses a method for utilizing the effective area of an image sensor. The invention belongs to the field of optical imaging. Generally, one optical lens forms an image on one image sensor, and the two optical lenses and the two image sensors are combined together when a 3D image is acquired. According to the invention, two different images are formed in different areas of one image sensor by using two optical lenses, so that a smaller size, better consistency and less heat can be realized when the image sensor is used for collecting 3D images. And the method can also be used for acquiring two images with different focusing points so as to calculate an ultra-depth-of-field image.

Description

Technical Field

[0001] Optical imaging. Background Technology

[0002] A medical endoscope is a medical device that enters the body through natural cavities or tiny incisions for observation, diagnosis, or treatment. It consists of a lens, light source, and image processing system, and can transmit in-body images in real time. It is widely used in disease examinations and minimally invasive surgeries in fields such as thoracic surgery, general surgery, neurosurgery, orthopedics, gastroenterology, respiratory medicine, and urology. 3D endoscopes can provide richer three-dimensional information, helping doctors perform more precise surgeries. Summary of the Invention

[0003] Existing 3D endoscopes typically employ two lenses and two image sensors, with each lens forming one image on a single image sensor. This invention uses two lenses and one image sensor, with each lens imaging in a different area of ​​the image sensor. This allows for a smaller structure, better consistency between the two images, and less heat generation. Detailed Implementation

[0005] The first step is to select an image sensor and confirm its resolution and pixel size. Here, we'll use an image sensor with a resolution of 1280*720 and a pixel size of 1.4 micrometers as an example. The second step is to calculate the width and height of the effective area of ​​the image sensor. The width is calculated by multiplying the pixel size of 1.4 micrometers by 1280, resulting in 1.9792 mm. The height is calculated by multiplying the pixel size of 1.4 micrometers by 720, resulting in 1.008 mm. The third step is to divide the image sensor into two regions. For example, divide it into two regions with a resolution of 640*720. The width of each region is calculated by multiplying the pixel size of 1.4 micrometers by 640, resulting in 0.896 mm, and the height is calculated by multiplying the pixel size of 1.4 micrometers by 720, resulting in 1.008 mm. The fourth step is to select a lens. Each region of the image sensor corresponds to one lens. The size of the image formed by the lens should not exceed the area of ​​the corresponding region of the image sensor. Here, the width of the image formed by the lens should not exceed 0.896 mm, and the height should not exceed 1.008 mm. Fifth step, lens position: the center of the image formed by the lens should be located at the center of the corresponding image sensor area.

Claims

1. A method for utilizing the effective area of ​​an image sensor, characterized in that: An image sensor is divided into two or more regions, each region corresponds to an optical lens, and each lens forms an image in the corresponding region; The optical lens is characterized in that: the size of the image formed by the optical lens is not greater than the area of ​​the corresponding region, and the center of the image formed by the optical lens should be located at the center of the corresponding region.