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Optical system and lens design for Blu-ray disc optical pick-up 被引量:1
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作者 李莉华 潘龙法 马建设 《Chinese Optics Letters》 SCIE EI CAS CSCD 2008年第6期426-430,共5页
During the design process of Blu-ray disc optical pick-up (BD OPU), the optical system and the collimator lens design is especially important. This paper designs an optical system and some lenses for'the BD OPU, in... During the design process of Blu-ray disc optical pick-up (BD OPU), the optical system and the collimator lens design is especially important. This paper designs an optical system and some lenses for'the BD OPU, including collimator lens, beam shaping lens for laser beam shaping, and cylinder lens for signal detecting. In this OPU, we use a triplet lens to collimate the laser beam. At the same time, we build a series of assembly jigs to make sure that each lens can be put into the OPU basement properly. At last, we get the reading spot image and S-curve photo of OPU, which can be used to read Blu-ray disc (BD). 展开更多
关键词 Computer networks Design Laser beams optical collimators optical data processing optical devices optical instrument lenses optical systems PHOTOLITHOGRAPHY Process design Process engineering Soldered joints
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Laser writing system for fabrication of diffractive optics elements
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作者 孙晓慧 周常河 +2 位作者 茹华一 张妍妍 余昺鲲 《Chinese Optics Letters》 SCIE EI CAS CSCD 2004年第1期4-6,共3页
We report a laser writing system for fabrication of diffractive optical elements with He-Cd laser. The wavelength of the light source is 441.6 nm. The output beam is collimated into parallel light with uniform intensi... We report a laser writing system for fabrication of diffractive optical elements with He-Cd laser. The wavelength of the light source is 441.6 nm. The output beam is collimated into parallel light with uniform intensity distribution after passing through the spatial filter with a pinhole of 25μm and the collimating device. A microscopy objective lens with numerical aperture (NA) of 0.65 is used to focus the beam into a small diffraction spot. Any pattern can be written with this system. Experimental results are presented. The written gratings and the phase patterns were verified with a conventional optical microscopy and the Taylor Hobson equipment. 展开更多
关键词 Diffraction gratings LASERS optical collimators
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Laboratory demonstration of static-mode down-looking synthetic aperture imaging ladar 被引量:3
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作者 卢智勇 张宁 +4 位作者 孙建锋 周煜 栾竹 蔡光宇 刘立人 《Chinese Optics Letters》 SCIE EI CAS CSCD 2015年第4期89-92,共4页
A static-mode synthetic aperture imaging ladar (SAIL) in which the target and carrying platform are kept still during the collection process is proposed and demonstrated. A target point of 0.5 mm× 0.5 mm and a ... A static-mode synthetic aperture imaging ladar (SAIL) in which the target and carrying platform are kept still during the collection process is proposed and demonstrated. A target point of 0.5 mm× 0.5 mm and a two-di- mensional (2D) object are reconstructed in the experiments, in which an optical collimator with a focal length of 10 m is used to simulate the far-field condition. The achieved imaging resolution is in agreement with the theo- retical design. The static-mode down-looking SAIL has the capability to eliminate the influence from the atmos- pheric turbulence and can be conveniently operated outdoors. 展开更多
关键词 Atmospheric turbulence optical collimators Synthetic apertures
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Laboratory demonstration of spotlight-mode down-looking synthetic aperture imaging ladar 被引量:3
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作者 张宁 卢智勇 +5 位作者 孙建锋 周煜 栾竹 孙志伟 李光远 刘立人 《Chinese Optics Letters》 SCIE EI CAS CSCD 2015年第9期20-24,共5页
We present a tabletop-scale spotlight-mode down-looking synthetic aperture imaging ladar (DL SAIL) demon- strator, which is performed by a collimator with 10 m focal length to simulate the far-field optical field. A... We present a tabletop-scale spotlight-mode down-looking synthetic aperture imaging ladar (DL SAIL) demon- strator, which is performed by a collimator with 10 m focal length to simulate the far-field optical field. A specular-point target and a diffuse-reflection target have been used for resolution analysis and 2D imaging, respectively. The experimental result is in agreement with the theoretical design. The experiment setup is capable of simulating a real application scenario for further study. This Letter is focused on the proposition and implementation of spotlight-mode DL SAIL. 展开更多
关键词 optical collimators Synthetic apertures
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