Current trends in creating optical systems for the IR region

Kulakova, N. A.; Nasyrov, A. R.; Nesmelova, I. M.

doi:10.1364/jot.77.000324

Cited by 12 publications

(8 citation statements)

References 13 publications

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“…The use of DOE is caused by the requirement to minimize longitudinal (axial) chromatic aberration in the image formed by the optical system. Engineering calculations of lens optical systems show that incorporating DOEs into an optical system simplifies its scheme, reduces the number of components and increases the calculated image quality [4,5]. However, the use of DOE is associated with the appearance of parasitic emission diffracted into side orders which can be a reason of color halo effect around the brightest parts of the image.…”

Section: Literature Overviewmentioning

confidence: 99%

The chromatic correction of zoom lenses for LWIR spectral range

Хацевич

Izhbuldin

2022

28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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Numerical simulations of longitudinal chromatic aberration in a four-component LWIR continuous zoom lens coupled to an uncooled detector are presented. The results have shown that in schemes containing two optical materials, most solutions involve the outer components made of germanium and the inner components made of materials with lower dispersion coefficients (chalcogenide glasses). The results are confirmed by the developed lens with a zoom ratio of 5X.

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Section: Literature Overviewmentioning

confidence: 99%

The chromatic correction of zoom lenses for LWIR spectral range

Хацевич

Izhbuldin

2022

28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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“…However, in reality, the Auger generation in CdHgTe p-i-n PDs operating in long wavelength radiation range can result in elevated dark currents and, hence, in a lower detectivity [32,33] (see also, Refs. [12,13].…”

Section: A Responsivitymentioning

confidence: 99%

“…The intersubband quantum-well infrared photodetectors (QWIPs) [1][2][3][4] based on the A 3 B 5 heterostructures have been developed since 1960s [5][6][7][8]. These photodetectors are still the subject of intensive theoretical and experimental studies [9][10][11][12][13][14][15]. Using different materials for the QWs and the inter-QW barrier layers, and varying the QW width, one can adjust the QWIP operation from near-infrared to terahertz frequencies.…”

Section: Introductionmentioning

confidence: 99%

Interband infrared photodetectors based on HgTe–CdHgTe quantum-well heterostructures

Aleshkin¹,

Dubinov²,

Морозов³

et al. 2018

Opt. Mater. Express

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Keywords: quantum well, HgTe-CdHgTe heterostructure, infrared photodetector, responsivity, detectivity. We calculate the characteristics of interband HgTe-CdHgTe quantum-well infrared photodetectors (QWIPs). Due to a small probability of the electron capture into the QWs, the interband HgTe-CdHgTe QWIPs can exhibit very high photoconductive gain. Our analysis demonstrates significant potential advantages of these devices compared to the conventional CdHgTe photodetectors and the A3B5 heterostructures.

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“…ChG has been widely used in various infrared optical systems due to its excellent optical properties [ 22 , 23 , 24 , 25 ]. ChG infrared night vision system uses infrared light to enable human eyes to observe scenes at night by converting the invisible infrared image of the scene into a visually sensible image.…”

Section: Introductionmentioning

confidence: 99%

A Review of the Precision Glass Molding of Chalcogenide Glass (ChG) for Infrared Optics

et al. 2018

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Chalcogenide glass (ChG) is increasingly demanded in infrared optical systems owing to its excellent infrared optical properties. ChG infrared optics including ChG aspherical and freeform optics are mainly fabricated using the single point diamond turning (SPDT) technique, which is characterized by high cost and low efficiency. This paper presents an overview of the ChG infrared optics fabrication technique through precision glass molding (PGM). It introduces the thermo-mechanical properties of ChG and models the elastic-viscoplasticity constitutive of ChG. The forming accuracy and surface defects of the formed ChG are discussed, and the countermeasures to improve the optics quality are also reviewed. Moreover, the latest advancements in ChG precision molding are detailed, including the aspherical lens molding process, the ChG freeform optics molding process, and some new improvements in PGM.

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Current trends in creating optical systems for the IR region

Cited by 12 publications

References 13 publications

The chromatic correction of zoom lenses for LWIR spectral range

The chromatic correction of zoom lenses for LWIR spectral range

Interband infrared photodetectors based on HgTe–CdHgTe quantum-well heterostructures

A Review of the Precision Glass Molding of Chalcogenide Glass (ChG) for Infrared Optics

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