A short-focus near-eye display system is provided, which relates to the field of near-eye display technologies, and solves the problems of a large field of view, a large exit pupil diameter, and contradiction between energy efficiency and volumes in an existing AR technology. The system includes a microdisplay, a convex partial reflector or a planar partial reflector, and a concave partial reflector. The microdisplay is located between the convex partial reflector and the concave partial reflector or the microdisplay is located between the planar partial reflector and the concave partial reflector, and emits light towards a pupil position. The convex partial reflector or the planar partial reflector is close to the pupil position, and the concave partial reflector is away from the pupil position. The microdisplay is a transparent display or a rotating linear display.

A see-through type display apparatus includes an image forming unit; a relay optical system configured to transmit an image provided from the image forming unit and to form a primary imaging image; and an optical combiner configured to reimage the primary imaging image transmitted from the relay optical system and to form a multi-depth plane. The relay optical system includes a lens; a polarizer arranged at an angle with respect to an optical axis and configured to reflect light of light of a first polarization and transmit light of second polarization therethrough; a condensing mirror member configured to reflect and condense light incident from the polarizer; and a polarization converter configured to convert a polarization of light transmitted between the polarizer and the condensing mirror member.

A cloaking device includes an object-side, an image-side and an apex axis extending from the object-side to the image-side. An object-side cloaking region (CR) planar reflection boundary having an outward facing mirror surface and an inward facing surface, and an image-side CR planar reflection boundary having an outward facing mirror surface and an inward facing surface, are included. A cloaking region is bounded by inward facing surfaces of the object-side CR planar reflection boundary and the image-side CR planar reflection boundary. At least one exterior curved reflection boundary with an inward facing mirror surface is spaced apart from the object-side CR planar reflection boundary and the image-side CR planar reflection boundary. A centrally positioned planar reflection boundary with an outward facing mirror surface is positioned between the objects-side and image-side CR planar reflection boundaries and faces the inward facing mirror surface of the at least one exterior curved reflection boundary.

An optical module includes: a first holding device with a circumference extending in a first circumferential direction; and a plurality of first supporting devices configured to support a first optical element, the first supporting devices being fixed at the circumference of the first holding device. Along the first circumferential direction, at least one of the first supporting devices is located in a non-equidistant manner between two neighboring first supporting devices. The optical module is configured to be used in a microlithography objective.

An imaging spectrometer receives a beam of light from a slit and outputs the beam of light to a focal plane. The output beam of light at the focal plane is dispersed in accordance with a spectral composition of the beam of light received from the slit. The imaging spectrometer comprises first to fourth curved reflective portions. The first to fourth curved reflective portions are arranged so that the beam of light, in its passage from the slit to the focal plane, sequentially strikes the first to fourth curved reflective portions and is reflected by the first to fourth curved reflective portions. Further, the first to fourth curved reflective portions are alternatingly concave or convex, respectively, along the passage of the beam of light. At least one of the first to fourth curved reflective portions has a reflective grating structure. Further disclosed is a method of manufacturing such imaging spectrometer.

Disclosed is an optical module for a lens, especially a microlithographic apparatus, comprising a first holding device (2) with an inner circumference (2.1) that extends in a first circumferential direction (2.2), and at least one first supporting device (3.1) which is fastened to the inner circumference (2.1) of said first holding device (2) and is used for supporting a first optical element (5.1), an annular circumferential first assembly space (3.18) being defined by displacing the first supporting device (3.1) once in a revolving manner along the first circumferential direction (2.2). At least one second supporting device (3.2) which is fixed to the inner circumference (2.1) of the first holding device (2) is provided for supporting a second optical element (5.2), an annular circumferential second assembly space (3.28) being defined by displacing the second supporting device (3.2) once in a revolving manner along the first circumferential direction (2.2). The first assembly space (3.18) intersects the second assembly space (3.28).

Reflective imager sub-systems that have a non-circular entrance pupil and provide substantially increased throughput to a detecting component of a system are disclosed.

The present disclosure describes a cavity accumulating the intensity of the laser beams reflecting within the cavity to build up power while also maintaining a relatively uniform intensity distribution. An apparatus comprising the cavity can be used to build up the power of the electromagnetic radiation for interacting with material, wherein the material does not substantially reflect or absorb the electromagnetic radiation.

An optical module is configured to be used in a microlithography objective. The optical module includes a first holding device with a circumference extending in a first circumferential direction and a first supporting device configured to support a first optical element. The first supporting device is fixed at the circumference of the first holding device. The optical module also includes a plurality of second supporting devices configured to support a second optical element, the second supporting devices being fixed at the circumference of the first holding device. The first supporting device does not contact the second supporting devices. The first optical element is separate from the second optical element. Along the first circumferential direction, the first supporting device is located in a non-equidistant manner between two neighboring second supporting devices.

An imaging spectrometer receives a beam of light from a slit and outputs the beam of light to a focal plane. The output beam of light at the focal plane is dispersed in accordance with a spectral composition of the beam of light received from the slit. The imaging spectrometer comprises first to fourth curved reflective portions. The first to fourth curved reflective portions are arranged so that the beam of light, in its passage from the slit to the focal plane, sequentially strikes the first to fourth curved reflective portions and is reflected by the first to fourth curved reflective portions. Further, the first to fourth curved reflective portions are alternatingly concave or convex, respectively, along the passage of the beam of light. At least one of the first to fourth curved reflective portions has a reflective grating structure. Further disclosed is a method of manufacturing such imaging spectrometer.