Design and fabrication of Si-HDPE hybrid Fresnel lenses for infrared imaging systems

Manaf, Ahmad Rosli Abdul; Sugiyama, Tsunetoshi; Yan, Jiwang

doi:10.1364/oe.25.001202

Cited by 30 publications

(8 citation statements)

References 18 publications

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“…It is important to distinguish our work from previous reports that utilize Fresnel lenses in the LWIR. An 80-normalμm-thick polymer Fresnel lens combined with a 755-normalμm-thick refractive silicon lens was used to report the thinnest LWIR lens (total device thickness ∼0.8 mm) capable of imaging (20). A high-order Silicon Fresnel lens made out of silicon was used in combination with an aperture for wide-angle imaging in the LWIR band as well (21), which had a total device thickness of 1 mm.…”

mentioning

confidence: 99%

Broadband lightweight flat lenses for long-wave infrared imaging

Meem

Banerji

Majumder

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

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We experimentally demonstrate imaging in the long-wave infrared (LWIR) spectral band (8 μm to 12 μm) using a single polymer flat lens based upon multilevel diffractive optics. The device thickness is only 10 μm, and chromatic aberrations are corrected over the entire LWIR band with one surface. Due to the drastic reduction in device thickness, we are able to utilize polymers with absorption in the LWIR, allowing for inexpensive manufacturing via imprint lithography. The weight of our lens is less than 100 times those of comparable refractive lenses. We fabricated and characterized 2 different flat lenses. Even with about 25% absorption losses, experiments show that our flat polymer lenses obtain good imaging with field of view of 35° and angular resolution less than 0.013°. The flat lenses were characterized with 2 different commercial LWIR image sensors. Finally, we show that, by using lossless, higher-refractive-index materials like silicon, focusing efficiencies in excess of 70% can be achieved over the entire LWIR band. Our results firmly establish the potential for lightweight, ultrathin, broadband lenses for high-quality imaging in the LWIR band.

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mentioning

confidence: 99%

Broadband lightweight flat lenses for long-wave infrared imaging

Meem

Banerji

Majumder

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

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“…To optimise the design of optical systems, additional components are typically added to reduce optical aberrations [21][22][23]. The elimination of chromatic aberrations is achieved by means of two lenses with positive and negative dispersion [24].…”

Section: Main Display Imaging Systemsmentioning

confidence: 99%

Research on Virtual Reality Head-Mounted Displays based on MEMS Technology

Ren

Dong

et al. 2023

J. Phys.: Conf. Ser.

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In order to render the gaze area and increase the pixels per degree of the area, this virtual reality head-mounted display device adds two MEMS 2D miniature scanning mirrors to the main display imaging, with a laser diode as the projection light source and the main display as the projection receiving screen. The light emitted by the laser lamp is projected onto the main display through multiple reflections. Through pre-processing of the image of the main display and the projected display, the image of the main display is combined with the projected image to achieve the rendering effect. It is integrated with an eye tracking system that allows the projected image to be consistently projected on the human eye area. The projection image is projected over the entire imaging area of the main display by resonant rotation of two MEMS 2D microscope mirrors.

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“…[ 17 ] Recently, Ahmad and co‐workers reported an IR Fresnel lens based on the composite structure fabricated by attaching a thin layer of high‐density polyethylene (HDPE) onto a flat single‐crystal silicon wafer via press molding. [ 18 ] Though it is a cost‐effective method for fabricating IR optical components, the high molding temperature, and the relatively low refractive index of HDPE may restrict the further application. The strategy using this composite structure which takes advantages of the easy processability of organic polymers and high dimensional stability of the inorganic substrate materials, is a promising approach in fabrication of the optical lenses.…”

Section: Introductionmentioning

confidence: 99%

Photo‐Curing Vis‐IR Hybrid Fresnel Lenses with High Refractive Index

Qiu

Jin

et al. 2021

Macro Chemistry & Physics

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Conventional IR lenses, typically refractive lenses, composed of inorganic semiconductors or chalcogenide glasses, are usually bulky, heavy, and difficult processable. Here, a one‐step photo‐curing imprinting strategy is presented to fabricate lightweight, compact, and high refractive index (HRI) hybrid Fresnel lenses for optical devices based on thiol‐ene/‐yne reactions. The hybrid Fresnel lenses consist of two layers: the silicon/quartz as the support substrate and HRI polymer films as functional layer which are synthesized by thiol‐ene/‐yne reactions with high sulfur‐content comonomers 2,3‐bis((2‐mercaptoethyl)thio)‐1‐propanethiol (BMETP) and its derivatives. The as‐prepared photopolymer films exhibit excellent transparency properties and HRI above 1.62 both in the visible and infrared regions, resulting from the large ratio of sulfur element with high molar refraction. A series of images captured by vis‐IR hybrid Fresnel lenses are demonstrated to confirm the applicability in the area of the optical imaging technique. This strategy, based on the one‐step photo‐curing imprinting, integrating the advantages of the easy processability of organic polymers and high dimensional stability of the inorganic substrate materials, provides a facile, processable, and highly efficient process for fabricating lightweight optical lenses.

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Design and fabrication of Si-HDPE hybrid Fresnel lenses for infrared imaging systems

Cited by 30 publications

References 18 publications

Broadband lightweight flat lenses for long-wave infrared imaging

Broadband lightweight flat lenses for long-wave infrared imaging

Research on Virtual Reality Head-Mounted Displays based on MEMS Technology

Photo‐Curing Vis‐IR Hybrid Fresnel Lenses with High Refractive Index

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