Zoom Lens Design for a 10x Slim Camera using Successive Procedures

Park, Sungchan; Lee, Sang-Hun

doi:10.3807/josk.2013.17.6.518

Cited by 19 publications

(7 citation statements)

References 11 publications

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“…Для спрощення задачі на практиці процес проєктування поділяють на окремі етапи, в яких спочатку визначають параметри та характеристики окремих складових компонентів [6,7]…”

Section: вступunclassified

Automated Design of the Optical System of the Zoom Riflescope

Sokurenko¹,

Sokurenko²

2022

Bull. Kyiv Polytech. Inst. Ser. Instrum. Mak.

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It is proposed to perform an automated design of a multi-lens optical system of a zoom riflescope by using one of modern global optimization algorithms, namely the adaptive Cauchy differential evolution method. The optical system considered here provides the magnification 4-16× and the angular field of view in the object space from 5.15° to 1.32°. It has the entrance pupil diameter of 42 mm, the exit pupil distance within 85...90 mm, and the maximum system length of 325 mm. The riflescope contains 14 lenses in 9 components made of glasses from the CDGM catalog. In all zoom configurations of the optical system, any ray vignetting is absent. To achieve the high image quality, the parametric synthesis of the riflescope has been carried out simultaneously for five intermediate configurations, corresponding to magnifications 16×, 13×, 10×, 7× and 4×. By using the developed specialized software, an experimental examination of the operability of this approach has been performed on the example of automated design of the optical system having the parameters similar those found in commercially available samples. The performed simulation showed that the time interval required for direct automated design of the riflescope’s optical system is about 25 hours. The total number of unknown parameters (variables) was up to 90. The root-mean-square values of the angular aberrations of the axial beams in all (five) configurations of the synthesized zoom system do not exceed 1 arc minute in the whole spectral range. The obtained results indicate that the design algorithm implemented in the computer program can be considered an effective tool capable to perform automated parametric synthesis of complex zoom optical systems with high image quality. The algorithm enables to establish the prescription data of optical systems, taking into account the technical requirements and restrictions specified by the designer.

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Section: вступunclassified

Automated Design of the Optical System of the Zoom Riflescope

Sokurenko¹,

Sokurenko²

2022

Bull. Kyiv Polytech. Inst. Ser. Instrum. Mak.

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“…By these iterative processes, the second group, third group, and fourth group are successively converted to real lens groups [13]. As a result, the lens module zoom system is group by group converted to the initial real lens zoom system without losing the equivalence to each other.…”

Section: Converting Lens Modules Into Real Lens Groups Successivelymentioning

confidence: 99%

“…(13) and (14), respectively. Its edge thickness was constrained to be more than 0.4 mm so that the curvature of the membrane can be sufficiently changed.…”

Section: Converting Lens Modules Into Real Lens Groups Successivelymentioning

confidence: 99%

Design of an 8x Four-group Inner-focus Zoom System Using a Focus Tunable Lens

Lee

Park

2016

Journal of the Optical Society of Korea

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This study presents an 8x four-group inner-focus zoom lens with one-moving group for a compact camera by use of a focus tunable lens (FTL). In the initial design stage, we obtained the powers of lens groups by paraxial design based on thin lens theory, and then set up the zoom system composed of four lens modules. Instead of numerically analytic analysis for the zoom locus, we suggest simple analysis for that using lens modules optimized. After replacing four groups with equivalent thick lens modules, the power of the fourth group, which includes a focus tunable lens, is designed to be changed to fix the image plane at all positions. From this design process, we can realize an 8x four-group zoom system having one moving group by employing a focus tunable lens. The final designed zoom lens has focal lengths of 4 mm to 32 mm and apertures of F/3.5 to F/4.5 at wide and tele positions, respectively.

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“…The lens modules do not reflect higher-order aberrations, so reducing the aperture and the field size of the system is desirable [13,14]. Thus, we took a zoom system with a half image size of 3 mm and f-number of F/3 at all positions.…”

Section: Initial Design For An Lwir Zoom Systemmentioning

confidence: 99%

Design and Analysis of a 10× Optical Zoom System for an LWIR Camera

Park

2014

Journal of the Optical Society of Korea

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This paper presents the design and evaluation of the optical zoom system for an LWIR camera. The operating wavelength range of this system is from 7.7 µm to 12.8 µm. Through a paraxial design and optimization process, we have obtained the extended four-group inner-focus zoom system with focal lengths of 10 to 100 mm, which consists of the six lenses including four aspheric surfaces and two diffractive surfaces. The diffractive lenses were used to balance the higher-order aberrations, and its diffraction properties were evaluated by scalar diffraction theory. We have calculated the polychromatic integrated diffraction efficiency and the MTF drop generated by background noise. The f-number of the zoom system is F/1.4 at all positions. Fields of view are given by 51.28°×38.46° at wide field and 5.50°×4.12° at narrow field positions. In conclusion, this design procedure results in a 10× compact zoom lens system useful for an LWIR camera.

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Zoom Lens Design for a 10x Slim Camera using Successive Procedures

Cited by 19 publications

References 11 publications

Automated Design of the Optical System of the Zoom Riflescope

Automated Design of the Optical System of the Zoom Riflescope

Design of an 8x Four-group Inner-focus Zoom System Using a Focus Tunable Lens

Design and Analysis of a 10× Optical Zoom System for an LWIR Camera

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