Method of widening of angular field of view of collimating optical systems

• US 8,982,472 B2
• Filed: 05/21/2013
• Issued: 03/17/2015
• Est. Priority Date: 05/21/2013
• Status: Active Grant

• Current Assignee: Alexsander Efros, Lvovskiy, Matvey
• Original Assignee: Alexsander Efros, Lvovskiy, Matvey
• Inventors: Lvovskiy, Matvey, Efros, Alexsander
• Primary Examiner(s): Parihar, Suchin
• Assistant Examiner(s): Alexander, William R
• Application Number:
  US13/898,591
• Publication Number:
  US 20140347737A1
• Time in Patent Office: 665 Days
• Field of Search: 359/641, 359648-351, 359/662, 359/663, 359/708, 359724-732, 359/744, 359798-801, 359/632
• US Class Current: 359/641
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/0123 comprising devices increasing the field of view
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 27/30 Collimators

Abstract

Method of horizontal widening of angular field of view of collimating optical system using several unified ax symmetric collimating optical systems spaced out horizontally with angular fields of view of rectangular shape with their boundaries oriented horizontally and vertically and their axes are turned horizontally relative to each other so that adjacent vertical boundaries of angular fields of view of neighboring systems coincide and full angular field of view of collimating optical system is sum of angular fields of view of unified optical systems included in it and to display total virtual information collimating optical system is conjugated with two-component combiner and primary image creators e.g. LCDs are located in focal planes of unified optical systems and wide-angle panoramic collimating optical system with horizontal field of view up to 360° can be build also.

Claims

1. A method of widening of angular field of view of collimating optical system used in head-up displays-HUD intended to control a flying vehicles and other moving objects whereas:

the system is carried out with several unified ax symmetric collimating optical systems having identical angular fields of view of rectangular shape, symmetry planes of the unified optical systems are set vertically and turned horizontally so that adjacent vertical boundaries of angular fields of view of neighboring systems are superposed;

the collimating optical is made with a single optical combiner.

2. The method of claim 1 wherein the two-component combiner is made in a form of two mutually parallel semitransparent reflectors located perpendicularly to the vertical symmetry plane of the collimating optical system.

3. The two-component combiner of claim 2 wherein the semitransparent reflectors of the combiner tilted at an angle 40°

. . . 50°

to horizontal plane are spaced out by height at a fixed distance, a lower reflector is located closer to an operator than an upper one, the upper reflector is made 1.8 . . . 2.2 times shorter than the lower one and has light-dividing coating on the whole surface area, the lower reflector has light-dividing coating only on its lower part the area of which is equal to the difference of full areas of the lower and the upper reflectors.

4. The Method of claim 1 wherein the collimating optical system is made of several equal optical modules, each module is assembled of several unified optical systems and a single two-component combiner fixed in a single case, reflectors of the combiner are located perpendicularly to the vertical symmetry plane of the optical module.

5. The method of claim 4 wherein the adjacent vertical edges of the combiner components of neighboring optical modules are superposed in joint fixing units, the width of non-transparent parts of said joint fixing units is no more than 50 mm (2″

), the width of the semitransparent part of any component of the combiner is not less than 80 mm (3¼

″

).

6. The method of claim 4 wherein the collimating optical system is made of a set of optical modules, the horizontal size of total angular field of view of said modules is 360°

.