Binary optical system of anti-gas mask helmet displayer

Abstract

The invention discloses a binary optical system of an anti-gas mask helmet displayer. The binary optical system consists of a binary optical holographic plane reflecting mirror and a relay system, wherein the reflecting mirror has a holographic plane, and light is emitted from a miniature display screen, sequentially passes through the relay system and the reflecting mirror and finally enters human eye pupils. In addition, a dip angle formed by a mechanical axis of the reflecting mirror and a primary ray of a zero view field is zero. The binary optical system of the anti-gas mask helmet displayer has the advantages that the system is small in volume and light in weight, double-path displaying can be achieved due to the facts that the dip angle formed by the mechanical axis of the reflecting mirror and the primary ray of the zero view field is zero and the reflecting mirror has the holographic plane, the blocking influence of the whole helmet displayer on view field is very small due to the fact that a double-path displaying mode is adopted, human eyes do not need to perform angle deflection in viewing, and the comfort is improved.

Description

technical field [0001] The invention relates to an optical system, in particular to an optical system of a helmet display. Background technique [0002] Head Mounted Display (HMD), referred to as HMD, is divided into half-projection type and full-projection type. It can enlarge the image generated by the small two-dimensional display through the optical system, and display the collimated image to infinity or a place far enough away. into a screen effect tens of meters away. Since the head-mounted display device is mounted on the observer's head, it must be compact and lightweight to reduce the load on the observer. With the increase of the observation field of view, the observation range will also increase, and the observer can observe high-quality dynamic images more fully. For head-mounted display systems, a large field of view is also very important. The field of view, exit pupil diameter, and focal length of the optical system are mutually restrictive, and it is quite...

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Problems solved by technology

[0006] The article "Head Mounted Display for Fire Fighters" published on "IFAWC2006,Mobile Research Center, TZI University Bremen.Germany" (IFAWC2006, Oz Mobile Research Center, University of Bremen, Germany) was designed for firefighters The HMD system of the NBC operator also involves the HMD system of the NBC operator. This kind of HMD is a full projection type. It only has a single channel and cannot watch external information at the same time.

Moreover, in order to reduce the obstruction of the line of sight, the zero-field chief ray of the HMD has a large deviation angle from the direction of the line of sight directly in front of the human eye. The human eye needs to turn a large angle when viewing, and it will be very tiring to watch for a long time

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