Search

CN-114052627-B - Endoscope light source device and system

CN114052627BCN 114052627 BCN114052627 BCN 114052627BCN-114052627-B

Abstract

The invention discloses an endoscope light source device and system, comprising a light source, a first rotary disk and a driving component, wherein the first rotary disk is provided with at least one pair of first light blocking areas which are arranged in a relative mode and at least one pair of first light transmitting areas which are arranged in a relative mode, the first rotary disk can cut the first light transmitting areas or the first light blocking areas on the first rotary disk into a light path generated by the light source through rotation, the driving component drives the first rotary disk to rotate relative to the light path generated by the light source, and the first light transmitting areas or the first light blocking areas on the driving component cut into the light path of the light source to form a light transmitting mode of 101010, so that the exposure time sequence of Global Shutter Sensor is generated according to the light transmitting mode, wherein 1 represents light transmission, and 0 represents complete shading. According to the scheme, the light transmission mode of 101010 is realized by controlling the position of the relative light path of the corresponding light control turntable, so that a light source matched with Rolling Shutter Sensor image data acquisition optimal exposure time sequence is generated.

Inventors

  • WANG YANGMING
  • WANG XIGUANG

Assignees

  • 上海澳华内镜股份有限公司

Dates

Publication Date
20260508
Application Date
20211118

Claims (8)

  1. 1. The endoscope light source device can be compatible with a global shutter image sensor and a rolling shutter image sensor, and comprises a light source, and is characterized by further comprising a first rotary table, a second rotary table and a driving assembly, wherein the first rotary table and the second rotary table are sequentially and oppositely arranged in a light path generated by the light source; The first turntable is provided with at least one pair of first light blocking areas which are arranged in a relative mode and at least one pair of first light transmitting areas which are arranged in a relative mode, the first turntable can cut the first light transmitting areas or the first light blocking areas on the first turntable into a light path generated by a light source through rotation to form a 101010 light transmitting mode, so that an exposure time sequence of a global shutter is generated, a light source which is matched with the optimal exposure time sequence for image data acquisition of the rolling shutter image sensor is formed, the light quantity of the light path in the first light blocking area of the first turntable is 0, and the light quantity of the light path in the first light transmitting area of the first turntable is 1; The light-blocking device comprises a light source, a first rotating disc, a second rotating disc, a first light-blocking area, a second light-blocking area, a first light-transmitting area, a second light-transmitting area, a first light-transmitting area and a second light-transmitting area, wherein a plurality of second light-transmitting areas are arranged on the second rotating disc, a corresponding optical filter area is formed by arranging optical filters with corresponding wavelengths in the second light-transmitting areas, and a corresponding second light-blocking area is formed by the areas on the second rotating disc, where the optical filters are located, the second rotating disc is arranged behind the first rotating disc along the propagation direction of the light source generating light path, and the second rotating disc can sequentially cut the second light-transmitting areas or the second light-blocking areas on the second rotating disc into the light path generated by the light source through rotation so as to be matched with the first rotating disc to adjust the light characteristics in the light path, the light-transmitting quantity of the light path is 1 in the second light-transmitting area of the second rotating disc, and the light-blocking area of the light path is 0; The driving assembly comprises a driving unit and a control unit, wherein the driving unit is used for driving the first turntable and the second turntable to rotate respectively, simultaneously feeding back rotation position information of the first turntable and the second turntable in real time, the control unit determines the relative position between the first turntable and the second turntable according to the rotation position information of the first turntable and the second turntable fed back by the driving unit, controls the driving unit to drive one optical filter area in a first light transmission area of the first turntable and a plurality of optical filter areas of the second turntable to rotate into an optical path respectively, and simultaneously overlaps the first turntable and the second turntable to realize that the first turntable and the second turntable transmit light simultaneously, so that each image sensor can sequentially switch all optical filters to acquire information of the same object by using a plurality of light with different wavebands, and the control unit controls the driving unit to drive a first light blocking area on the first turntable and a second light blocking area on the second turntable to rotate into the optical path respectively, simultaneously overlaps the first optical filter area and the second optical filter area on the second turntable to realize that the first turntable and the second turntable need to switch the first light blocking area and the second light blocking area to complete the first light blocking area and the second light blocking area to switch the second light blocking area to be static relatively.
  2. 2. An endoscope light source device according to claim 1, wherein the driving assembly is adapted to adjust the time and frequency of the light transmission form of 101010 in accordance with the operation state of the endoscope imaging module, 1 corresponding to the exposure area of the imaging module, and 0 corresponding to the exposure area of the imaging module.
  3. 3. An endoscope light source device according to claim 1 and wherein said first light blocking region on said first turntable is fan-shaped.
  4. 4. An endoscope light source device according to claim 1, wherein a neutral gray scale sheet or grid is provided in the first light-transmitting region on the first turntable.
  5. 5. An endoscope light source device according to claim 1 and wherein said first light transmitting region on said first turntable is provided with a filter which cooperates with said second turntable to selectively vary the spectrum of transmitted light.
  6. 6. An endoscope light source device according to claim 1, wherein a neutral gray scale sheet or grid is provided in the second light-transmitting region of the second turntable.
  7. 7. The endoscope light source device according to claim 1, wherein a plurality of second light transmitting areas on the second turntable are sequentially distributed along the circumferential direction of the second turntable, and a spacing area between adjacent second light transmitting areas forms a second light blocking area.
  8. 8. An endoscope imaging system is characterized by comprising the light source device, the light guide element and the image sensor, wherein one end of the light guide element is matched with the light source device, the other end of the light guide element is matched with the image sensor, and the image sensor is a global shutter image sensor or a rolling shutter image sensor.

Description

Endoscope light source device and system Technical Field The invention relates to the technical field of endoscopes, in particular to an imaging technology of an endoscope. Background Because the colors, structures and components of different tissues and organs are different, the spectrum of the required light source is different, so that the design of the spectrum of the light source is required according to the actual demands of the tissues and organs on different spectrums, the endoscope camera shooting technology in recent years is greatly improved, the image definition and the contrast are greatly improved, and the focus (such as a convex tumor and a concave ulcer) with obviously changed shape and color can be clearly developed under the common white light illumination. For tiny, flat early cancer, abnormal hyperplasia and the like, diagnosis is difficult and even missed. In recent years, endoscope companies have introduced technologies such as pigment endoscope, electron spectroscopy, narrow-band imaging, optical biopsy, fluorescence imaging, etc., which greatly improve the diagnosis level of early cancer. At present, most of endoscope light source products only generate specific light wave bands, and cannot generate full spectrum light sources. The light source can generate high spectrum light, the method is that the illumination light is projected out of the light with different wave bands through the optical filters with different wave bands, the mechanical structure is that the optical filters are arranged on the circumference of the rotating disk which is free to rotate, and the optical filters through which the light passes are changed by controlling the rotating disk through a motor, so that the function of selecting the output wavelength is realized. The structural diagram is shown in fig. 1: the tissue organ is irradiated by a special light source, and the optimal exposure effect can be achieved by matching the image sensor with the light source. The shutter is mainly used to control the effective exposure time of the camera sensor. In general, the larger the time range of the shutter, the better. The seconds are low, so that the device is suitable for shooting an object in motion, but when a driver needs to shoot a night water horse, the shutter time is prolonged, and the silk-like water flow effect in a common photo can be shot by using a slow shutter. Currently there are two main exposure Shutter techniques, rolling Shutter and Global Shutter. For Rolling Shutter exposure techniques: The exposure of the Sensor, see fig. 2,Rolling Shutter, is performed in a line-by-line exposure. At the beginning of exposure, the Sensor scans line by line and exposes line by line until all pixels are exposed. Of course, all actions are completed in an extremely short time. The exposure time of the pixels of different rows is different. For Global Shutter exposure techniques: Referring to fig. 3, unlike Rolling Shutter, the whole frame is exposed at the same time. All pixels of the camera Sensor sense light at the same time and expose simultaneously. The Sensor reads the same picture at the same time. Global Shutter exposure times are shorter but increase RMS readout noise Rolling Shutter can achieve higher frame rates but when the exposure is misdirected or the object is moving faster, partial exposure, ramp patterns, sloshing, etc. can occur. The phenomenon of partial exposure, slope and shaking caused by the tiny displacement of the fast moving object in the line exposure time is defined as jelly effect, and the phenomenon of Rolling Shutter shooting is defined as jelly effect. Applications with short exposure times (e.g., <500 mus) fit Global Shutter and when the exposure times are long (e.g., >500 mus), the choice Rolling Shutter may have lower noise and frame rate. See fig. 4-5, which are therefore examples of two exposure technique principles. Fig. 4 shows a Rolling Shutter exposure mode, line by line. While fig. 5 shows a Global Shutter exposure mode, all pixels are exposed together. Further, at the time of photographing, rolling Shutter imaging process is as follows: Fig. 6 is a typical scene (upper fan, lower car) Rolling Shutter scanned line by line, and imaged as in fig. 7. The object being moved is exposed to Rolling Shutter lines and lines, and the image is acquired, so that the deformation is very serious. And Global Shutter is that all pixels are exposed at the same time, so that no such distortion occurs. From the above, it can be seen that if the speed of movement Rolling Shutter is such that it can reach the level of the mechanical focal plane shutter, the dependency on the mechanical shutter can be released. I.e. the read-out speed of the data has to be increased. The main bottleneck in this speed is the time required for the charge transfer from the column amplifier to the common data line, specifically the process of charging a capacitor by an op-amp, which is increased only by increasi