Abstract:
To eliminate influence of undesirable light component from an object when measuring optical characteristics such as shape and wavefront aberration of the object, light from light source (101) is separated by polarization beam splitter (103) into measuring light (L1) that irradiates and travels via the object (108) and is condensed on image plane (P) through microlenses (114a) of microlens array (114), and reference light (L2) that does not irradiate the object and is guided to the image plane by reference light optical system (109). A computer (113) acquires picked-up images sequentially from CCD image sensor (116) arranged on the image plane while changing optical path length of the reference light by movable stage (117), extracts interference light spots generated through interference between signal light component and the reference light from the picked-up images, calculates positions of the interference light spots, and calculates deviation amounts of positions from predetermined reference positions.
Abstract:
A phase diversity wavefront sensor includes an optical system including at least one optical element for receiving a light beam; a diffractive optical element having a diffractive pattern defining a filter function, the diffractive optical element being arranged to produce, in conjunction with the optical system, images from the light beam associated with at least two diffraction orders; and a detector for detecting the images and outputting image data corresponding to the detected images. In one embodiment, the optical system, diffractive optical element, and detector are arranged to provide telecentric, pupil plane images of the light beam. A processor receives the image data from the detector, and executes a Gerchberg- Saxton phase retrieval algorithm to measure the wavefront of the light beam.
Abstract:
A device for mapping the topography of the cornea (38) of an eye has a light source (10) for directing a beam of collimated monochromatic light characterized by a flat wave front onto the cornea. Positioned between the light source and the cornea is an objective lens (32) for focusing this flat wave front toward the cornea as a converging spherical wave front. The light reflected from the cornea passes back through the objective lens to establish a reflected wave front having deviations from the flat wave front caused by aberrations on the cornea that are indicative of corneal topography. This reflected wave front is then segmentally focused by a lens array (64) into a pattern which reveals the deviations for use in mapping the topography of the cornea.
Abstract:
PURPOSE: An autofocusing device of electric optical imaging equipment and an autofocusing method thereof are provided to calculate a defocus size by directly measuring the optical guide surface phase information of light which is incident to the optical system, to confirm a focal state, and to rapidly adjust focus of the electric optical imaging equipment. CONSTITUTION: An autofocusing device of electric optical imaging equipment(20) comprises a Shack Hartmann wavefront sensor(10), an optical system(21), a space filter(17), and an imaging equipment signal processing unit. The Shack Hartmamn wavefront sensor obtains a point light source which forms a plurality of point images from a complex optical image of a target(50). The defocus size of the Shack Hartmann wavefront sensor is calculated by obtaining a partial inclination of a light guide surface which forms the point light force based on the displacement of the point image with a phase value simultaneously. The optical system includes a focal adjusting lens(22), a lens adjusting device(24), and a plane mirror(25). The space filter is installed at a position where an optical passage changed in the plane mirror is connected to the wavefront sensor. The imaging equipment signal processing unit is connected to imaging equipment detecting unit(28) which detects an image phase fallen on a focal surface(26) of the imaging equipment by being arranged in the rear side of the focal surface.
Abstract:
본 고안은 부피와 무게를 줄여 이동과 보관의 용이성을 제공하면서 저렴한 가격으로 공급할 수 있도록 하고, 물결파의 깨끗한 상을 제공하고 정지된 파형의 관찰을 용이하게 할 수 있도록 한 물결파 투영을 통한 파동 관찰장치에 관한 것으로서, 상기 파동 관창장치(50)는, 물결을 발생시키기 위한 일정량의 물을 수용할 수 있도록 일정 높이로 돌출된 테두리(51)와 투명한 바닥면(53)을 가지고 구비되는 물결통(52)과; 상기 물결통(52)을 지지하도록 저면에 접철 가능하게 구비되는 다리(54)와; 상기 물결통(52)의 내부 사방 가장자리에는 물결이 반사되는 것을 방지하도록 구비하는 반사방지구(55)와; 상기 물결통(52)의 테두리(51)에 고정되는 브라켓(58)에 상향 돌출되게 연결되는 연결바(59)와; 상기 연결바(59)에 구비되는 진동브라켓(63)에 파동을 일으키도록 연결하는 통상적인 진동수단(60)과; 상기 연결바(59)에 구비되는 조명브라켓(65)에 스크린(61)에 물결상을 맺히도록 고휘도엘이디(67)를 장착하여 설치되는 조명(62)을 포함하는 구성이다. 물결파, 파동, 투영, 관찰
Abstract:
An on-chip wavefront sensor, an optical chip, and a communication device are disclosed. The on-chip wavefront sensor includes an antenna array configured for separating received spatial light to obtain a plurality of sub-light spots; a reference light source module configured for generating a plurality of intrinsic light beams; a phase shifter array configured for performing phase shifting processing on the intrinsic light beams to obtain reference light; and an optical detection module configured for performing coherent balanced detection according to the reference light and the sub-light spots to obtain a photocurrent corresponding to each of the sub-light spots.