All-reflective zoom systems for infrared optics

Chang, Jun; Wang, Yongtian; Zhang, Tingcheng; Talha, Muhammad; Weng, Zhicheng; Yang, Haijun

doi:10.1117/12.692311

Cited by 4 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4][5] The conventional zoom systems are usually obtained using a mechanical method, which changes the focal length of the system by adjusting the separations between individual or groups of optical elements, such as lenses and mirrors. 6,7 Recently, optical zoom systems without moving elements have been proposed. [8][9][10] Kuiper et al designed a zoom camera which is based on two-focus liquid lenses and three plastic lenses.…”

Section: Introductionmentioning

confidence: 99%

Active optical system for any field angle zoom

2011

Opt. Eng

View full text Add to dashboard Cite

We have theoretically proposed a new type of active optical zoom system. It can change the magnification of an imaging system at any field angle, namely, it can change the effective focal length at a limited region of interest and simultaneously maintain high resolution. It is comprised of two static aspheric mirrors and two deformable mirrors; furthermore, by changing the curvature of mirrors the focal length can be adjusted from − 399 to − 558.6 mm. The system reduces the bandwidth of data transmission and may find potential applications in high speed photography. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).Subject terms: any field angle; deformable mirror; active zoom system; optical systems design.Paper 110523RR

show abstract

Section: Introductionmentioning

confidence: 99%

Active optical system for any field angle zoom

2011

Opt. Eng

View full text Add to dashboard Cite

show abstract

“…The application of aspherical elements in the optical system can both improve the image quality and reduce the complexity of optical system. As the sole part in military or civilian optical systems, the aspherical components have been widely applied in aerospace remote sensing, astronomic observation, deep space exploration, opti-electrical trackers, optical lithography objectives, lens in high quality camera (camcorder), and other applications adopted in opti-electrical instruments [1][2][3] .…”

Section: Introductionmentioning

confidence: 99%

Technology on Fabrication of Precise SiC Aspherical Mirror

Zhang

2011

AMR

View full text Add to dashboard Cite

This paper represents a technique to produce the large size optical aspherical mirror by using reaction-bonded silicon carbide to meet the material requirements of the space used mirrors, based on the characters comparison of all types mirror material. Techniques are described in this paper, including the bonding procedure of silicon carbide to form a mirror shape, the CCOM technology for aspheric grinding, polishing on a home-developed tool –FSGJ-2, and the aspheric profilometry. A specialized Offner Null lens is also developed to measure the aspherical mirror with laser interferometer. With the technology depicted in the paper, a 502mm x 298 mm off-axis SiC aspherical mirror is successfully made with a surface accuracy better than 1/50λrms, the final result meets the design requirement.

show abstract

“…The zoom optical system is a kind of system with important functions [1,2] . The effective focal length (EFL) of the zoom system is variable.…”

mentioning

confidence: 99%

Design of a freeform, dual fields-of-view, dual focal lengths, off-axis three-mirror imaging system with a point-by-point construction-iteration process

2016

View full text Add to dashboard Cite

In this Letter, we propose a novel configuration and design method of freeform, dual fields-of-view (FOVs), dual focal lengths, off-axis three-mirror zoom imaging systems. The switch of the two zooms is achieved by rotating a single mirror element. The design of a freeform, dual focal lengths zoom system is realized by a point-by-point design approach for the first time to our knowledge. This method enables the direct design of freeform surfaces from initial planes using given system specifications and configuration, and the designed system can be taken as a good starting point for further optimization. A freeform, dual FOVs, dual focal lengths, off-axis three-mirror zoom system is demonstrated. The F-numbers of the two zooms are 2 and 2.4. The dual FOVs are 3°× 3°and 2.5°× 2.5°. After final optimization, both of the zooms achieve high performances.

show abstract

All-reflective zoom systems for infrared optics

Cited by 4 publications

References 2 publications

Active optical system for any field angle zoom

Active optical system for any field angle zoom

Technology on Fabrication of Precise SiC Aspherical Mirror

Design of a freeform, dual fields-of-view, dual focal lengths, off-axis three-mirror imaging system with a point-by-point construction-iteration process

Contact Info

Product

Resources

About