Compact lens assembly for the teleportal augmented reality system
AssigneeUniversity of Central Florida
InventorsHong Hua, Jannick Rolland
Life of this patent
Estimating the term…
Abstract
A compact, ultra-light and high-performance projection optics lens assembly using Diffractive Optics Technology, plastic and glass optics, and Aspheric optics has been designed with only four elements. The lens may be included as is, or scaled to be included in all instruments using conventional Double-Gauss lens forms. The preferred lens is only 20 mm in diameter and 15 mm long has a weight of only 8 g. Thus, two lenses for head mounted stereo displays is only 16 g. Such a stereo display, known as a head-mounted projective display (HMPD), consists of a pair of miniature projection lenses, beam splitters, and miniature displays mounted on the helmet, and retro-reflective sheeting materials placed strategically in the environment.
Claims21
A compact lens assembly comprising:
- a positive convex-concave singlet lens;
- a plastic singlet lens adjacent to the positive lens, having one face being an aspheric substrate plus a diffractive optical surface;
- a mid-located stop/shutter positioned adjacent to the singlet lens;
- a plastic singlet negative lens with an aspheric surface on one of the faces adjacent to the stop/shutter;
- and
- a glass singlet lens adjacent to the negative lens, whereby the diffractive lens and the glass lens, and combination of the plastic and glass lens allows for visible spectrum images without smears and reduced weight.
A method of forming a compact lens display assembly comprising the steps of:
- (a) combining two aspheric plastic negative lenses with two positive glass lenses to form a combination of four element optics;
- and
- (b) combining said combination of four element optics with additional diffractive optics whereby said lens display assembly provides visible spectrum images without smears.
A four lens component compact lens assembly comprising in combination:
- a positive singlet first lens;
- a singlet second lens adjacent and no intervening lenses to the positive lens, having one face being an aspheric substrate plus a diffractive optical surface;
- a mid-located stop/shutter positioned adjacent and no intervening lenses to the singlet lens;
- a singlet negative third lens with a aspheric surface on one face adjacent and no intervening lenses to the stop/shutter;
- and
- a singlet fourth lens adjacent and no intervening lenses to the third lens, whereby the four lens assembly allows for visible spectrum images without smears and reduced weight.
A four lens component compact lens assembly comprising in combination:
- a positive singlet first lens;
- a plastic singlet second lens adjacent to the positive lens, having one face being an aspheric substrate plus a diffractive optical surface;
- a mid-located stop/shutter positioned adjacent to the singlet lens;
- a plastic singlet negative third lens with a aspheric surface on one face adjacent to the stop/shutter;
- and
- a singlet fourth lens adjacent to the third lens, whereby the four lens assembly allows for visible spectrum images without smears and reduced weight.
A four lens component compact lens assembly comprising in combination:
- a positive singlet first lens;
- a singlet second lens adjacent to the positive lens, having one face being an aspheric substrate plus a diffractive optical surface;
- a mid-located stop/shutter positioned adjacent to the singlet lens;
- a singlet negative third lens with a aspheric surface on one face adjacent to the stop/shutter;
- and
- a glass singlet fourth lens adjacent to the third lens, whereby the four lens assembly allows for visible spectrum images without smears and reduced weight.
A four lens component compact lens assembly comprising in combination:
- a positive singlet first lens;
- a singlet second lens adjacent to the positive lens, having one face being an aspheric substrate plus a diffractive optical surface;
- a mid-located stop/shutter positioned adjacent to the singlet lens;
- a singlet negative third lens with a aspheric surface on one face adjacent to the stop/shutter;
- and
- a singlet fourth lens adjacent to the third lens, whereby the four lens assembly allows for visible spectrum images without smears and reduced weight, wherein the assembly has dimensions of approximately 15 mm by approximately 20 mm.
A method of forming a compact lens display assembly comprising the steps of:
- (a) combining aspheric negative lenses with positive lenses;
- (b) combining said combined lens with additional diffractive optics whereby said lens display assembly provides visible spectrum images without smears;
- and
- (c) fitting the lens display assembly into a space having dimensions of approximately 15 mm by approximately 20 mm.
Dependencies are inferred from the claim text.