Imaging optical system and display apparatus
AssigneeAnhui Easpeed Technology Co., Ltd.
InventorsLiangliang Zhang, Junchang Li
Life of this patent
Estimating the term…
Abstract
Provided are an imaging optical system capable of increasing a field of view and a display apparatus. The imaging optical system includes a flat lens and a reflection assembly. The flat lens includes two groups of optical waveguide arrays. The reflection assembly has at least one pair of reflection surfaces. Two reflection surfaces in a same pair are located at an image source side and a viewing side of the flat lens, respectively. An angle between each reflection surface and the flat lens is smaller than or equal to 90 degrees. Angles between each of the two reflection surfaces in the same pair and the flat lens are equal, and intersection lines of each of the two reflection surfaces in the same pair and the flat lens are parallel to each other.
Claims10
A display apparatus, comprising:
- an imaging optical system, wherein the imaging optical system comprises:
- a flat lens comprising two groups of optical waveguide arrays, each group of optical waveguide arrays being composed of a plurality of rows of sub-waveguides arranged in a single column and each having a rectangular cross section, wherein the two groups of optical waveguide arrays comprise a first optical waveguide array and a second optical waveguide array, the sub-waveguides in the first optical waveguide array extending in an X direction and being arranged in a plurality of rows in a Y direction, the sub-waveguides in the second optical waveguide array extending in the Y direction and being arranged in a plurality of rows in the X direction, the first optical waveguide array and the second optical waveguide array being arranged in a Z direction, every two of the X direction, the Y direction, and the Z direction being perpendicular to each other, the flat lens having a center normal line passing through a center of the flat lens and being parallel to the Z direction, two opposite sides of the flat lens being an image source side and a viewing side, respectively;
- and
- a reflection assembly having at least one pair of reflection surfaces, two reflection surfaces in a same pair being located at the image source side and the viewing side, respectively, each reflection surface being planar and facing towards the center normal line, and an angle between each reflection surface and the flat lens being smaller than or equal to 90 degrees,
- wherein angles between each of the two reflection surfaces in the same pair and the flat lens are equal, and intersection lines of each of the two reflection surfaces in the same pair and the flat lens are parallel to each other;
- and
- a display located at the image source side and having a display screen facing towards the flat lens, wherein:
- the display screen is a straight panel screen, an angle between the display screen and the flat lens being an acute angle, the display screen having four edges that are a proximal edge, a distal edge, and two inclined edges, respectively, the proximal edge and the distal edge being two opposite edges of the display screen, and the proximal edge being located at a side edge of the display screen that is close to the flat lens;
- and
- at the image source side, two sides of the display screen corresponding to the two inclined edges have reflection surfaces, respectively, and/or a side of the display screen corresponding to the distal edge has a reflection surface.
Dependencies are inferred from the claim text.