Browsing by Author "Chu, Pu-Yi"

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Double biprism arrays design using for stereo-photography of mobile phone camera
(2016)
Sun, Wen-Shing
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Chu, Pu-Yi
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Chao, Yu-Hao
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Pan, Jui-Wen
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Tien, Chuen-Lin
Generally, mobile phone use one camera to catch the image, and it is hard to get stereo image pair. Adding a biprism array can help that get the image pair easily. So users can use their mobile phone to catch the stereo image anywhere by adding a biprism array, and if they want to get a normal image just remove it. Using biprism arrays will induce chromatic aberration. Therefore, we design a double biprism arrays to reduce chromatic aberration.
Optimization design of periscope type 3X zoom lens design for a five megapixel cellphone camera
(2016-01-01)
Sun, Wen-Shing
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Tien, Chuen-Lin
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Pan, Jui-Wen
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Chao, Yu-Hao
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Chu, Pu-Yi
This paper presents a periscope type 3X zoom lenses design for a five megapixel cellphone camera. The configuration of optical system uses the right angle prism in front of the zoom lenses to change the optical path rotated by a 90(circle) angle resulting in the zoom lenses length of 6 mm. The zoom lenses can be embedded in mobile phone with a thickness of 6 mm. The zoom lenses have three groups with six elements. The half field of view is varied from 30(circle) to 10.89(circle), the effective focal length is adjusted from 3.142 mm to 9.426 mm, and the F-number is changed from 2.8 to 5.13.
Simulation of autofocus lens design for a cell phone camera with object distance from infinity to 9.754 mm
(2015-10-01)
Sun, Wen-Shing
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Tien, Chuen-Lin
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Pan, Jui-Wen
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Huang, Kai-Chang
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Chu, Pu-Yi
This paper presents the simulation of an autofocus lens design with large depth of field for a cell phone camera. The object distance of the lens is from infinity to 9.754 mm. When the object distance is from infinity to 550 mm, the value of the modulation transfer function (MTF) is greater than 0.6 for the spatial frequency of 114 lp/mm, the optical distortion is less than 1.5%, and the relative illumination is greater than 67%. When the object distance is from 325 to 9.754 mm, the MTF values is greater than 0.4 for close-up shooting. The optical distortion is less than 1.454%, and the relative illumination is greater than 68.8%. (C) 2015 Optical Society of America