Patent
Automatic focus device and method thereof
Wei-Yao Hsu,Chien-Shing Lee,Nien-Tsu Chen,Po-Jui Chen,Cheng-Fang Ho,Fang-Hsuan Su,Fong-Zhi Chen,Chien-Jen Chen +7 more
- 28 Sep 2007
7
TL;DR: In this article, an auto focus device and a method for generating a light spot from a reflected beam from a test subject was presented, and a photo detecting device was disposed with respect to the lens set for receiving the light spot and generating a driving signal.
read more
Abstract: An auto focus device and method are provided. The device comprises a beam splitter set; a laser emitting device disposed at a first side of the beam splitter set for providing a laser beam to the beam splitter; a lens set disposed at a second side of the beam splitter set and opposing to the testing subject positioned at a third side of the beam splitter set for refracting a reflected beam from a testing subject for generating a light spot; and a photo detecting device disposed with respect to the lens set for receiving the light spot and generating a driving signal.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Patent
Automatic focusing apparatus and method
Chien-Sheng Liu,Pin-Hao Hu +1 more
- 25 Apr 2011
TL;DR: In this paper, an automatic focusing apparatus and a method thereof are provided, which includes a light source, an optical imaging unit, a photo-sensor and a focusing regulation unit.
20
Patent
Optical sensor device
Eric Gurny,Alexandre Obtonine +1 more
- 10 Oct 2008
TL;DR: In this paper, an optical sensor device (38) for use in a measuring and/or inspection apparatus comprises a white light sensor (44), a wideband radiation source (50), a wavelength-sensitive receiver (52) and a beam splitting means (60); and an objective (46) for directing a measuring beam onto an object and detecting a reflection beam reflected from the object to be measured.
16
Patent
Focusing methods and optical systems and assemblies using the same
Dale Buermann,Alexander P. Kindwall +1 more
- 16 Nov 2010
TL;DR: In this article, a conjugate lens is used to guide a pair of incident light beams to converge toward a focal region, where the reflected light beams return to and propagate through the lens.
14
Patent
Optimal zoom indicators for map search results
Lisa Seacat Deluca,Lydia M. Do,Charles M. Kinard +2 more
- 13 Jun 2013
TL;DR: In this paper, a system, method and computer program product for indicating an optimal magnification level for displaying search query results in a mapping application running in a computer device is presented, which includes: obtaining search results for a business or category of interest in a geographical area; determining the search results to be displayed within a map application; determining an optimal magnifications level corresponding to a search result; generating a magnification indicator for indicating the optimal magnification levels for the search result.
8
Patent
Vision measuring device and focusing method thereof
Chang Chih Kuang,Jiang Li,Yang Hua-Wei +2 more
- 16 Jan 2010
TL;DR: In this paper, a Z-axis driving system, a stage for placing an object, and an image capturing device is mounted at one end of the Zaxis Driving System adjacent the stage.
1
References
Patent
Microscope system and microscope focus maintaining device for the same
Takashi Yoneyama,Atsuhiro Tsuchiya,Kenichi Koyama +2 more
- 27 Sep 2004
TL;DR: The Through-the-Lens: TTL (TTL) system as discussed by the authors uses an autofocus unit controlling a focusing driving unit by a so-called TTL system, which makes at least one of the stage and the objective lens move by a predetermined constant amount.
73
Patent
Apparatus and method for automatically focusing an interference microscope
Donald K. Cohen,James D. Ayres,Eugene R. Cochran +2 more
- 01 Jun 1990
TL;DR: In this paper, a beam splitter intercepts part of the interference beam and directs it to the point detector, and the objective then moves rapidly from the initial position until the presence of fringes is detected by the point detectors, and then moves more slowly through the interference window until fringes again are detected; the lower speed results in substantially reduced overshoot.
59
Patent
Displacement detecting apparatus using graduated linear scale
Akitaka Hiruta,Kayoko Taniguchi,Takao Yukawa +2 more
- 15 Jun 1992
TL;DR: In this article, a displacement detecting apparatus consisting of a non-contacting sensor for detecting a displacement of a measured surface, a linear scale unitarily attached to the sensor through a coupling member, a graduation read-out device for reading out a graduation of the linear scale, and an actuator for moving the sensor and the scale in unison with each other.
29
Patent
Method and apparatus for generating focus error signals in a multi-beam optical disk drive
Amir Alon,Michael Naor,Shlomo Shapira,Tatania Kosoburd +3 more
- 08 Oct 1999
TL;DR: In this article, a focus detection system for use in a multi-beam optical pickup assembly is provided that uses an optical element (44), either a holographic element or diffractive element, to split beams reflected off of a data-bearing surface of an optical disk (100) into a plurality of data beams.
20
Patent
Automatic focusing device
Tsuneshi Yokota
- 14 Jun 1982
TL;DR: In this article, an automatic focusing device includes an optical head which comprises a focusing lens system and an optical sensor, which is driven to focus a reading laser beam or a recording laser beam on an optical disk.
17
Related Papers (5)
Yoo Jinn-Chou,Chen Chun-Min,Liao Cheng-Shun +2 more
- 01 May 2015
Lee Keun Jong
- 15 Feb 2000
Chen Yen Chen,Yoo Jinn Chou,Chen Chun Min,Liao Cheng Shun +3 more
- 16 Nov 2014
Tu Yangyang,Qi Chunchao,Tan Xinhui +2 more
- 07 Jun 2019