A light field camera

Abstract

The invention relates to the field of imaging technology, and discloses a light field camera, which includes a main lens, a retarder, a liquid crystal microlens array, a polarizer and an image sensor arranged sequentially along the direction of the optical path. On the surface, the image sensor is located on the focal plane of the liquid crystal microlens array; the liquid crystal microlens array converges the first polarized light incident on it to form a four-dimensional light field image at the image sensor position; the liquid crystal microlens array does not change the incident polarized light on it The propagating direction of the second polarized light to form a two-dimensional image at the image sensor position; the polarizer selectively allows the first polarized light or the second polarized light to pass through to form the four-dimensional light field image or two-dimensional image at the image sensor position image. The light field camera is beneficial to realize the miniaturization design of the camera and can ensure good imaging quality.

Description

technical field [0001] The invention relates to the technical field of cameras, in particular to a light field camera. Background technique [0002] With the increasing popularity of electronic devices, cameras are used more and more in people's lives. Traditional cameras can only collect two-dimensional (2D) projections of three-dimensional objects on the image plane. Although they can record the spatial distribution of objects, they cannot record the propagation direction of light. In response to this deficiency, [Ren Ng, Marc Levoy, et al, Light Field Photography with a Hand-held Plenoptic Camera, Stanford Tech Report CTSR 2005-02] Stanford University proposed a light field camera, which can record two-dimensional space including objects The four-dimensional (4D) light field information of the position and the two-dimensional propagation direction of the light retains the possibility of reshaping the image, and has the advantages of first taking a picture and then focusi...

AI Technical Summary

Problems solved by technology

[0004] However, this technology needs to reserve additional moving space in the camera to meet the mechanical displacement requirements of the microlens array, which is not conducive to the miniaturization design of the camera.

Moreover, because the focal length of the microlens array is very short, the mechanical reset error caused by the microlens array moving out and moving into the optical path will directly affect the imaging quality

Images