scholarly journals Miniature Camera Lens Design with a Freeform Surface

2017 ◽  
Author(s):  
Yufeng Yan ◽  
Jose M. Sasian
Keyword(s):  
Freeform Surface ◽  
Lens Design ◽  
Camera Lens

High Resolution Camera Lens Design for Tablet PC

2016 ◽  
pp. 761-771
Author(s):  
Ching-Huang Lin ◽  
Hsien-Chang Lin ◽  
Ta-Hsiung Cho ◽  
Hsuan-Fu Wang ◽  
Cheng-Chieh Tseng
Keyword(s):  
High Resolution ◽  
Lens Design ◽  
Tablet Pc ◽  
Camera Lens

A combined lens design for an LED low-beam motorcycle headlight

2017 ◽  
Vol 50 (3) ◽  
pp. 456-466
Author(s):  
D Luo ◽  
P Ge ◽  
D Liu ◽  
H Wang
Keyword(s):  
Freeform Surface ◽  
Lens Design ◽  
White Led ◽  
Baffle Plate ◽  
Yellow Light ◽  
Temperature Drift ◽  
Colour Temperature ◽  
Clear Cut ◽  
Class B ◽  
Micro Lens Array

A conventional low-beam projector headlight design for a motorcycle conventionally uses a combination of an elliptical reflector and a baffle plate. A clear cut-off line is formed by the baffle plate. Since only one freeform surface is used, the dispersion phenomena will occur with a white LED light source because the blue and yellow light is mixed unevenly. This leads to a high colour temperature. Another method uses a micro-lens array to solve the colour temperature problems. Without using the baffle plate, it is difficult to form a clear cut-off line. What’s more, the freeform surface of the lens is complex and difficult to fabricate. We propose a combined lens, which uses a double freeform surface lens combined with a single freeform surface lens. In the combined lens, the double freeform surface lens is designed to solve the colour temperature drift and the single freeform surface lens is designed to solve the problem of the cut-off line. The simulation results can meet the ECE Regulation R113 revision 2(Class B) of the motorcycle low-beam.

Wideband Comet Camera Lens Design

1981 ◽  
Vol 20 (6) ◽  
Author(s):  
Edward D. Huber
Keyword(s):  
Lens Design ◽  
Camera Lens

A Fresnel freeform surface collimating lens for LEDs

2017 ◽  
Vol 50 (6) ◽  
pp. 952-960 ◽  
Author(s):  
L Zhu ◽  
A Ge ◽  
Z Ge ◽  
R Hao ◽  
J Chen ◽  
...  
Keyword(s):  
Freeform Surface ◽  
Lens Design ◽  
Compact Structure ◽  
Manufacturing Tolerances ◽  
Freeform Lens ◽  
Collimating Lens

This paper proposes a freeform surface lens design based on the Fresnel model to achieve a compact structure and good collimation. A simulation indicates the lens enjoys an efficiency as high as 88.43% within a half view angle of 2° for 1 × 1 mm2 size LED. This paper makes a comparison of three types of lens, among which the Fresnel freeform lens achieves the best performance when the LED size is smaller than 2.5 × 2.5 mm2. The influence of the LED size and the manufacturing tolerances are discussed.

Single-shot depth camera lens design optimization based on a blur metric

2010 ◽  
Author(s):  
Yung-Lin Chen ◽  
Chuan-Chung Chang ◽  
Ludovic Angot ◽  
Chir-Weei Chang ◽  
Chung-Hao Tien
Keyword(s):  
Design Optimization ◽  
Depth Camera ◽  
Single Shot ◽  
Lens Design ◽  
Camera Lens

Freeform surface lens design for uniform illumination

2008 ◽  
Vol 10 (7) ◽  
pp. 075005 ◽  
Author(s):  
Hao Xiang ◽  
Zheng Zhenrong ◽  
Liu Xu ◽  
Gu Peifu
Keyword(s):  
Freeform Surface ◽  
Lens Design ◽  
Uniform Illumination

Freeform surface lens design for uniform illumination of a rectangular area

2014 ◽  
Vol 47 (6) ◽  
pp. 705-711 ◽  
Author(s):  
K Zhang ◽  
CY Su ◽  
ZY Feng ◽  
WJ Wang ◽  
CH Zhang
Keyword(s):  
Freeform Surface ◽  
Lens Design ◽  
Uniform Illumination ◽  
Rectangular Area
Sign in / Sign up

Export Citation Format

Share Document