43results about How to "Good depth of field" patented technology

A method is described of capturing an image. The method comprising the steps of: exposing an image sensor to radiation from a first part of the electromagnetic spectrum using a first aperture and to radiation from a second part of the spectrum using a second aperture having a different size than the first aperture; and, forming an image on the basis of first image data generated by the radiation from the first part of the spectrum and second image data generated by radiation from the second part of the spectrum.

A method and a system for forming an image of a scene are provided. The method includes capturing an image of the scene by exposing an image sensor to radiation from one part of the EM spectrum using one aperture and to radiation from another part of the EM spectrum using another aperture having a different size than the first aperture. Simultaneously with capturing the image, the scene is illuminated with radiation from the second part of the EM spectrum. The image is then formed on the basis of image data generated by the radiation from the first part of the EM spectrum and image data generated by radiation from the second part of the EM spectrum.

The present invention provides an apparatus and a system for improving depth of focus (DOF), wherein an optical lens for optical processing is actuated to vibrate whereby the DOF of the optical processing is increased due to the variation of focal point. In the embodiment of the present invention, an actuator is coupled to the optical lens for providing vibration energy wherein the optical lens is actuated by the vibration energy so as to vibrate on an optical axis thereof so as to increase the DOF during the optical processing, thereby improving the quality and efficiency of optical processing.

The present invention provides a method for dynamically adjusting image quality, including steps, A1. Take the current frame, the frames of the first set value before it, and the frames of the second set value after it, and for each frame of image The brightness of the pixel point at the set position of the set value is carried out, and the loop detection of the number of times of the third set value is carried out to calculate the average value of the average level of the dynamic image quality; A2. Divide the brightness interval into the fourth set value level, and divide the The pixel points of the image are sampled, the brightness of the obtained pixel points is measured, and statistics are carried out with the brightness level of the fourth set value, and the ratio of the pixel points whose brightness does not reach the average value to all the sampled pixel points is calculated; A3. The numerical value is multiplied by the proportional numerical value to obtain the average correction value of the average dynamic image quality; A4. Use the input image information to superimpose the correction value as the output image information. From the level of image decoding, the overall image quality level is improved, and the problem of life damage of the screen caused by backlight changes is eliminated.

Sulfonium and iodonium salts of nitrogen-containing carboxylic acids are novel. The onium salt functions as an acid diffusion controlling agent in a resist composition, enabling to form a pattern of good profile with high resolution, improved MEF, LWR and DOF.

The invention discloses a monitoring camera with day and night double apertures. The monitoring camera comprises a Fresnel lens, a driven infrared sensor, an automatic switching aperture lens, an image sensor, an infrared auxiliary illumination circuit and an environment brightness detection circuit, and further comprises a low-power-consumption MCU (Micro-programmed Control Unit) and a DSP (Digital Signal Processor) processing chip, wherein the automatic switching aperture lens is arranged in a manner being aligned to the image sensor and the automatic switching aperture lens comprises a lens assembly and a switchable aperture pair; the switchable aperture pair is provided with a daytime aperture and a nighttime aperture, which have different apertures; the aperture of the daytime aperture is smaller than that of the nighttime aperture; an infrared filter is arranged on the surface of the daytime aperture; at the daytime, the daytime aperture is aligned to a lens of the lens assembly; at the nighttime, the switchable aperture pair can be switched into the nighttime aperture; and the nighttime aperture is aligned to the lens of the lens assembly. The monitoring camera with the day and night double apertures disclosed by the invention realizes automatic induction shooting and night vision functions and effectively overcomes the contradiction between daytime field depth and nighttime brightness of a fixed aperture monitoring camera.

The present invention relates to a medical examination device, in particular to an ophthalmic slit lamp microscope. The slit lamp microscope is provided with a base on which a slit lamp assembly, an objective assembly and an eyepiece assembly are arranged, wherein the slit lamp assembly comprises a light source above which a slit seat bottom bracket is arranged, a slit seat is arranged in the slit seat bottom bracket, the upper surface of the slit seat is provided with a diaphragm disc on which at least two diaphragm sheets are arranged, and the diaphragm disc is rotatablely connected with the slit seat. The slit seat is fixedly provided with a positioning reed and a positioning groove outside the circumference of the diaphragm disc, and one end of the positioning reed is elastically embedded in the positioning groove. The slit lamp microscope adopts the rotary diaphragm disc on which the diaphragm sheets with different diameters are arranged for adjusting the facula size, and has the characteristics of clear ocular optic section, high brightness, light weight, portability and simple operation.

A sparse DOA estimation is based on a multi-level prime arrays (MLPAs) as a general structure for coprime arrays. The array uses multiple uniform subarrays “or levels” where the number of antenna elements of the subarrays are pairwise coprime integers. The subarrays overlap only at their first antenna element by adjusting the inter-element spacing. By selecting the number of antennas of the subarrays and controlling the inter-element spacing, various MLPAs of different features can be constructed. The configuration that realizes the maximum number of unique lags is recommended because the DOF is upper bounded by the number of lags.