High-speed rotating mirror system for wide-angle image projection.

1974 ◽  
Author(s):  
William L. Foley
Keyword(s):  
High Speed ◽  
Mirror System ◽  
Wide Angle ◽  
Image Projection

Design of an off-axis three-mirror system with high speed for hyperspectral imagers

2008 ◽  
Author(s):  
Guangbiao Gong ◽  
Yiquan Ji ◽  
Shanbing Zhu ◽  
Ruirui Zhang ◽  
Weimin Shen
Keyword(s):  
High Speed ◽  
Mirror System

scholarly journals Design of Wide Angle and Large Aperture Optical System with Inner Focus for Compact System Camera Applications

2019 ◽  
Vol 10 (1) ◽  
pp. 179 ◽  
Author(s):  
Hojong Choi ◽  
Jaemyung Ryu
Keyword(s):  
Optical System ◽  
High Speed ◽  
Resolving Power ◽  
Wide Angle ◽  
Phase Detection ◽  
Half Angle ◽  
Stepper Motors ◽  
Angle Of View ◽  
Floating Type ◽  
Focusing Lens

Conventionally, a bright, very wide-angle optical system is designed as a floating type optical system that moves two or more lens groups composed of multiple lens in order to focus accurately. These have been widely used as phase detection auto focus (AF) methods within conventional digital single-lens reflex (DSLR) cameras. However, a phase detection AF optical system cannot be used when recording motion pictures. In contrast, a compact system camera (CSC) performs AF by the contrast method, where a stepper motor is used as the driving source for moving the optical lens. Nonetheless, to ensure that the focusing lens is lighter, these stepper motors should not have high torque and AF must be possible by moving only one lens. Yet, when focusing is performed with only one lens, aberration change due to focusing lens movement is magnified. Therefore, a very wide-angle optical system comprised of a half-angle of view more than 40 degrees and F of 1/4 has not been developed. Here, a very wide-angle optical system was designed with high resolving power that enables high speed AF, even in contrast mode, by moving only one lens while minimizing aberration change.

High-speed deformable mirror system

1982 ◽  
Vol 21 (4) ◽  
pp. 589 ◽  
Author(s):  
R. H. Freeman ◽  
H. R. Garcia
Keyword(s):  
High Speed ◽  
Mirror System ◽  
Deformable Mirror

Development of high-speed and wide-angle visible observation diagnostics on Experimental Advanced Superconducting Tokamak using catadioptric optics

2013 ◽  
Vol 84 (8) ◽  
pp. 085102 ◽  
Author(s):  
J. H. Yang ◽  
X. F. Yang ◽  
L. Q. Hu ◽  
Q. Zang ◽  
X. F. Han ◽  
...  
Keyword(s):  
High Speed ◽  
Wide Angle ◽  
Superconducting Tokamak

Mt. Dushak-Erekdag Observatory: A Chance to Close the Asian Gaps in WET Coverage

2003 ◽  
Vol 12 (2) ◽  
Author(s):  
T. N. Dorokhova ◽  
N. I. Dorokhov
Keyword(s):  
Soviet Union ◽  
Central Asia ◽  
Former Soviet Union ◽  
High Speed ◽  
Astronomical Observatory ◽  
Light Pollution ◽  
Wide Angle ◽  
International Programs ◽  
Low Light ◽  
Stable Economy

AbstractThe Mt. Dushak-Erekdag Observatory (Central Asia, Turkmenistan, 58° E longitude) is located just in the longitudes gap of asteroseismological networks. It is the southernmost observatory of the former Soviet Union, its latitude is +38°. The sky seeing at the site is one of the best in Central Asia: a low light pollution, high and stable sky transparency, over 200 usable nights per year. The altitude is above 2000 m.Odessa Astronomical Observatory has its 0.8 m telescope with a two-star high-speed photometer there, which frequently participates in international programs and multi-site campaigns. An accuracy of the photometry amounts to 1 mmag. Besides, a 1 m wide-angle telescope and a dual-tube telescope with 0.5m mirrors are installed at the observatory.The developed infrastructure at the site and the stable economy in Turkmenistan make the Mt. Dushak-Erekdag Observatory very interesting for the WET observations.

Filament identification in wide-angle high speed imaging of the mega amp spherical tokamak

2019 ◽  
Vol 90 (9) ◽  
pp. 093502
Author(s):  
T. Farley ◽  
N. R. Walkden ◽  
F. Militello ◽  
M. Sanna ◽  
J. Young ◽  
...  
Keyword(s):  
High Speed ◽  
Spherical Tokamak ◽  
Wide Angle ◽  
High Speed Imaging

scholarly journals Fast Mask Image Projection-Based Micro-Stereolithography Process for Complex Geometry

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Yayue Pan ◽  
Yong Chen ◽  
Zuyao Yu
Keyword(s):  
Delay Time ◽  
High Speed ◽  
Complex Geometry ◽  
Single Layer ◽  
Separation Process ◽  
Image Projection ◽  
Minimum Delay ◽  
Minimum Delay Time ◽  
Critical Challenge ◽  
Surface Technique

In micro-stereolithograhy (μSL), high-speed fabrication is a critical challenge due to the long delay time for refreshing resin and retaining printed microfeatures. Thus, the mask-image-projection-based micro-stereolithograhy (MIP-μSL) using the constrained surface technique is investigated in this paper for quickly recoating liquid resin. It was reported in the literature that severe damages frequently happen in the part separation process in the constrained-surface-based MIP-μSL system. To conquer this problem, a single-layer movement separation approach was adopted, and the minimum delay time for refreshing resin was experimentally characterized. The experimental results verify that, compared with the existing MIP-μSL processes, the MIP-μSL process with single-layer movement separation method developed in this paper can build microstructures with complex geometry, with a faster build speed.

Sign in / Sign up

Export Citation Format

Share Document