Browsing by Author "Tien, Chuen-Lin"

Now showing 1 - 8 of 8

Compact LED projector design with high uniformity and efficiency
(2014-10-10)
Sun, Wen-Shing
;
Tien, Chuen-Lin
;
Ma, Chao-Hui
;
Pan, Jui-Wen
;
光電系統研究所
The aim of this study is to design a compact LED projector that is divided into two systems: an illumination system and an imaging optical system. The illumination system consists of an RGB LED light source with a collimator lens group and a mirror with a color filter and a lens array integrator instead of an integrated rod so as to improve the uniformity of the light intensity. By using a new total internal reflection prism and projection lens, the whole optical engine is smaller in size and has a higher contrast ratio for image quality. The imaging optical system consists of a total of eight lenses (six spherical lenses and two aspherical lenses), for a total length of 52 mm; a tolerance analysis is conducted. Optical simulation software is used for the system analysis in order to determine the efficiency and uniformity of the light intensity. In this design, the uniformity of the screen reaches more than 82%, and the efficiency increases by more than 44%. (C) 2014 Optical Society of America
Double biprism arrays design using for stereo-photography of mobile phone camera
(2016)
Sun, Wen-Shing
;
Chu, Pu-Yi
;
Chao, Yu-Hao
;
Pan, Jui-Wen
;
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
;
Tien, Chuen-Lin
;
Pan, Jui-Wen
;
Chao, Yu-Hao
;
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 and comparison of the illuminance, uniformity, and efficiency of different forms of lighting used in basketball court illumination
(2014-10-10)
Sun, Wen-Shing
;
Tien, Chuen-Lin
;
Tsuei, Chih-Hsuan
;
Pan, Jui-Wen
;
光電系統研究所
We simulate and compare the illuminance, uniformity, and efficiency of metal-halide lamps, white LED light sources, and hybrid light box designs combining sunlight and white LED lighting used for indoor basketball court illumination. According to the optical simulation results and our examination of real situations, we find that hybrid light box designs combining sunlight and white LEDs do perform better than either metal-halide lamps or white LED lights. An evaluation of the sunlight concentrator system used in our inverted solar cell shows that the energy consumption of stadium lighting can be reduced significantly. (C) 2014 Optical Society of America
Simulation and Comparison of the Lighting Efficiency for Household Illumination with LEDs and Fluorescent Lamps
(2013-10-01)
Sun, Wen-Shing
;
Tien, Chuen-Lin
;
Pan, Jui-Wen
;
Yang, Tsung-Hsun
;
Tsuei, Chih-Hsuan
The design of the LEDs lighting in general household illumination was proposed and compared with the fluorescent lighting in this study. Using the LED as a light source would promote energy saving lighting for household illumination purposes. We used the LightTools and DIALux software to design and simulate different standards of illuminance, different correlated color temperatures and different color rendering indices for household environments. The power consumption and efficiency of traditional illuminated light sources and an LED light source with the same standard of illuminance for lighting the household environment were analyzed and compared with each other. Finally, our results show the advantages of using white-light LEDs for lighting and household illumination.
Simulation and Comparison of the Lighting Efficiency for Household Illumination with LEDs and Fluorescent Lamps
(2013-10-01)
Sun, Wen-Shing
;
Tien, Chuen-Lin
;
Pan, Jui-Wen
;
Yang, Tsung-Hsun
;
Tsuei, Chih-Hsuan
The design of the LEDs lighting in general household illumination was proposed and compared with the fluorescent lighting in this study. Using the LED as a light source would promote energy saving lighting for household illumination purposes. We used the LightTools and DIALux software to design and simulate different standards of illuminance, different correlated color temperatures and different color rendering indices for household environments. The power consumption and efficiency of traditional illuminated light sources and an LED light source with the same standard of illuminance for lighting the household environment were analyzed and compared with each other. Finally, our results show the advantages of using white-light LEDs for lighting and household illumination.
Simulation design of a wearable see-through retinal projector
(2015-05-10)
Sun, Wen-Shing
;
Tien, Chuen-Lin
;
Chiang, Yen-Chen
;
Pan, Jui-Wen
;
光電系統研究所
This study proposes a new simulation design for a wearable see-through retinal projector combined with a compact camera. The see-through retinal projector is composed of an illumination system and eyepiece system. In this eyeglass-mounted design, all the information is projected directly into the user\'s eyes using a see-through retinal projector. The retinal projector forms a 20 in. (50.8 cm) upright virtual image located 2 m in front of the human eye, and the illumination system provides uniform illumination for liquid crystal on silicon (LCoS) panels. Moreover, an RGB LED array is used as the light source to generate color images with color sequences. The compact camera has a lens with an aperture of F/2.8, a half field-of-view (FOV) of 30 degrees, and 2 million pixels. This optical system design with the combination of a see-through retinal projector and a compact camera has a volume of about 5.83 cm(3) and a weight of 6.02 g. (C) 2015 Optical Society of America
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
;
Tien, Chuen-Lin
;
Pan, Jui-Wen
;
Huang, Kai-Chang
;
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