Overview ‹ Time-folded optics — MIT Media Lab
Time-folding can fold the lens-sensor distance into significantly smaller distances. The focal length can be mapped into time t0 and this time instance can be accessible at much smaller physical distance than what thin lens equation enforced.
Folded optics - Wikipedia
Folded optics is an optical system in which the beam is bent in a way to make the optical path much longer than the size of the system. This allows the resulting focal length of the objective to be greater than the physical length of the optical device.
Distant Focus Corporation : Projects - Folded Optical Systems
Folded Optic technology provides a means for significantly reducing the length of a telescopic lens. The reduction is accomplished by relaying light back and forth between refective surfaces supporting diamond-turned concentric aspheric focal zones.
Polychromatic annular folded lenses using freeform gradient …
2021年9月30日 · The annular folded lens (AFL) is a design form offering large aperture, high-resolution imaging in a very axially compact package. The folded optic can be made monolithic for easier fabrication...
Folded lens, a next-generation nano-optical device ...
2024年11月21日 · By arranging metasurfaces on a glass substrate so that light can be reflected and moved around in the glass substrate in a folded manner, the researchers have realized a lens system with a thickness of 0.7mm, which is much thinner than existing refractive lens systems.
Off-axis metasurfaces for folded flat optics - Nature
2023年9月12日 · To reach the limits of miniaturization, it is possible to reduce both component volume and path length by combining the concepts of metasurface flat optics and folded optics. In addition to their...
Polymeric, birefringent reflective polarizers have been used to produce compact, mid-field-of-view eyepieces and wide field-of-view optics for virtual reality (VR) head-mounted displays using the “pancake” lens configuration.
Folded optics makes cameras smaller | Vision Systems Design
2007年4月30日 · Folding the optic enables a longer effective focal length without increasing the distance from the front of the optic to the image sensor. To reduce camera thickness, researchers at UCSD replaced the lens of a traditional camera with a “folded” optical system.
Polychromatic annular folded lenses using freeform gradient …
The annular folded lens (AFL) is a design form offering large aperture, high-resolution imaging in a very axially compact package. The folded optic can be made monolithic for easier fabrication and alignment, yet the introduction of refractive surfaces with a dispersive optical material gives way to chromatic aberrations.
Folded zoom lenses – a review of patent literature
Zemax models were built for 68 folded zoom lenses. Glass types and paraxial properties are compared. Detailed analysis is presented for the two of the most-similar designs, in terms of both engineering and IP.