Curved focal plane detector array for wide field cameras

Dumas, D. J.P.; Fendler, M.; Baier, N.; Primot, Jérôme; Coarer, E. Le

doi:10.1364/ao.51.005419

Cited by 56 publications

(42 citation statements)

References 14 publications

(12 reference statements)

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“…By curving a Focal Plane Array (FP A), one can correct this aberration without extra corrective lenses [4]. This can be applied to terrestrial and spatial telescopes [5] and very compact high-performance cameras [6]. Also a step forward has been crossed toward bio-inspired cameras.…”

Section: Introductionmentioning

confidence: 99%

Mechanical behavior of flexible silicon devices curved in spherical configurations

Tekaya

Fendler

Inal

et al. 2013

2013 14th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and

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International audienceFoldable, stretchable and flexible electronics is of constant increasing interest since the early 2000's. Its applications spread from OLED-based displays, bio-inspired detectors and 'epidermal electronics'. Cylindrical curvature is largely studied through many 3 points and 4 points bending variations in electronic devices. However spherical curvature is poorly addressed, especially for monolithic approach. In this paper, a simulation and experiments of the elastic deformation of a thin silicon chip on a spherical holder are presented. The holder can have a concave or a convex shape. The chip is a square of 10 by 10 mm2. Its thickness is 50, 25 or 15 μm. The simulation is performed in 3 steps. First, the use of a shell model is validated by a convergence study and by a comparison with a 3D model and the literature. Then, the influence of the anisotropic elastic behavior (single crystal) is considered. In a given bulge test condition, isotropic and anisotropic silicon simulation gave similar deformations. At the end, the spherical forming is accomplished with a shell model and an anisotropic law. Experimental data is obtained by curving thin silicon plates of various thicknesses on different radii holders in a press. The comparison between experimental and computed results is realized. We found similar macroscopic deformations for both concave and convex shapes. The influence of chip thickness and applied pressure is studied on characteristic folds and flat part amplitudes. A heterogeneous stress distribution with hundreds of MPa variations can explain the difference observed between curved chips and perfect spherical holders. The stress level in electrical and optical active layers of thin curved silicon-based devices may affect their properties. A numerical example on a bolometer gives a stress-induced resistivity variation over 10

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Section: Introductionmentioning

confidence: 99%

Mechanical behavior of flexible silicon devices curved in spherical configurations

Tekaya

Fendler

Inal

et al. 2013

2013 14th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and

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“…Designs like this have worked in the past with fiber-optic field flatteners and image tubes, for night vision applications. This design, however, has a very much higher correction level than prior designs and would be a great match to a curved surface detector array like that recently discussed by Dumas et al [ 7 ].…”

Section: Curved Image Designsmentioning

confidence: 95%

Lens designs with extreme image quality features

Shafer¹

2013

Advanced Optical Technologies

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Abstract:In order to best assess the importance of new technologies to optical design, it is useful to consider what the limits are to what can be done with ' old ' technologies. That may show where something new is needed to overcome the limitations of existing optical designs. This article will give a survey of some remarkable highperformance designs, some of which are extremely simple, and most of which only use technology that has already been around for decades. Each of these designs has some limitation that would be nice to overcome. One new technology that will probably revolutionize optical design will be curved surfaces on image chips.

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“…As explained by Rim et al [4] or Fendler & Dumas [8][9] [10], the curvature of focal plane arrays leads to a drastic simplification of the optical systems by offering a new parameter in the optimizations. The field curvature, composed to first order by the Petzval curvature and the astigmatism aberration, no more has to be compensated by a set of complex optics flattening the field.…”

Section: A Static Curvaturementioning

confidence: 99%