Illumination light path for aircraft angle position indicator

Abstract

The invention discloses an illumination light path for an aircraft angle position indicator. The illumination light path comprises a monochromatic light source group, a collimating lens group and a dodging device group which are sequentially arranged from front to back along an optical axis. The monochromatic sources of the monochromatic source group, the collimating lenses of the collimating lens group and the dodging devices of the dodging device group are in one-to-one correspondence. And the collimating lenses are used for performing collimation or quasi-collimation processing on emergent light beams of the corresponding monochromatic light sources. And the light homogenizing devices are used for homogenizing emergent light beams of the corresponding monochromatic light sources. Wherein the dodging devices of the dodging device group are physically isolated, so that the dodging devices do not influence each other. The beneficial effects of the invention lie in that through the collimating lens group, the dodging device group and the light window, the output with the light emitting area size conforming to a certain proportion and with uniform illumination and small divergence angle can be obtained, no optical filter needs to be arranged, and the output efficiency is high.

Description

Technical Field

[0001] The invention relates to an aircraft angle position indicator, in particular to an illumination light path for the aircraft angle position indicator. Background Art

[0002] As the requirements for landing attitude accuracy of land or carrier-based aircraft continue to increase, an indicator that can provide detailed and accurate angular position information through different colors is very necessary. Currently, the existing aircraft angular position indicators generally use white light sources. The outgoing light beam of the white light source first passes through the illumination optical path, then passes through a multi-color filter to obtain the color of the required color coordinates, and finally serves as the input of the indicator imaging optical path. The disadvantage is that the overall efficiency of the optical path is low due to reasons such as filters. Summary of the invention

[0003] The purpose of the present invention is to solve the problem of low efficiency of the optical path of the aircraft angle position indicator in the prior art and to provide a novel illumination optical path for the aircraft angle position indicator.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a technical solution: an illumination light path for an aircraft angle position indicator, as an input of the indicator imaging light path, comprising: a monochromatic light source group, a collimating lens group and a homogenizing device group arranged in sequence from front to back along the optical axis; the monochromatic light source of the monochromatic light source group, the collimating lens of the collimating lens group, and the homogenizing device of the homogenizing device group are in a one-to-one correspondence; the collimating lens is used to collimate or quasi-collimate the outgoing light beam of the corresponding monochromatic light source, and the homogenizing device is used to homogenize the outgoing light beam of the corresponding monochromatic light source; wherein the homogenizing devices of the homogenizing device group are physically isolated so as not to affect each other.

[0005] As a preferred solution for the illumination light path of the aircraft angle position indicator, it further includes: a light window arranged along the optical axis behind the light homogenizing device group, the light window is used to cut off the outgoing light beams of each monochromatic light source.

[0006] As a preferred solution for the illumination light path of the aircraft angle position indicator, the light window is fitted with the light homogenizing device.

[0007] As a preferred solution for the illumination light path of the aircraft angle position indicator, the monochromatic light source group has monochromatic light sources of two or more colors.

[0008] As a preferred solution for the illumination light path of the aircraft angular position indicator, the monochromatic light source is an LED monochromatic light source or a LD monochromatic light source.

[0009] As a preferred solution for the illumination light path of the aircraft angular position indicator, the collimating lens is a TIR lens, a parabolic reflector, a combination of an ellipsoidal reflector and a positive lens, or a combination of an ellipsoidal reflector and a negative lens.

[0010] As a preferred solution for the illumination light path of the aircraft angle position indicator, the light homogenizing devices of the light homogenizing device group are separated by a non-light-transmitting structural member to achieve the physical isolation.

[0011] As a preferred solution for the illumination light path of the aircraft angle position indicator, the non-light-transmitting structural member is coated with a reflective film.

[0012] Compared with the prior art, the beneficial effects of the present invention are at least that: through the collimating lens group, the light homogenizing device group and the light window, an output with a light output area size that meets a certain proportion and a uniform illumination and a small divergence angle can be obtained, and there is no need to set a filter, and the output efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention. Implementation

[0014] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0015] Since the components of the embodiments of the present invention can be implemented in a variety of ways, these directional terms are used for the purpose of explanation rather than limitation. Therefore, the following specific embodiments are not intended to be limiting, and the scope of the present invention is defined by the appended claims.

[0016] Figure 1 The principle diagram of the illumination light path for the aircraft angle position indicator is schematically shown. The indicator comprises: a light source group 101, a collimating lens group 102, a light homogenizing device group 103 and a light window 104. The light source group 101, the collimating lens group 102, the light homogenizing device group 103 and the light window 104 are arranged in sequence from front to back along the optical axis. The light source of the light source group 101, the collimating lens of the collimating lens group 102 and the light homogenizing device of the light homogenizing device group 103 are in a one-to-one correspondence.

[0017] The light source group 101 has light sources of two or more colors. The light sources of the light source group 101 are LED light sources or semiconductor laser light sources, and the monochromatic light or its half-wave width is ≤60nm.

[0018] The collimating lens of the collimating lens group 102 is a single lens or a combination of two, three or more single lenses, for example, a TIR lens, a parabolic reflector, an ellipsoidal reflector + a positive lens or a negative lens or other lens group styles. The collimating lens of the collimating lens group 102 is set to emit the light source at a smaller divergence angle, such as a full angle of ≤60° at a 10% peak.

[0019] The light homogenizing device of the light homogenizing device group 103 is a rectangular optical light guide plate, and the size of its light-emitting surface or the size ratio of the light-emitting surface after passing through the light window 104 strictly corresponds to the angle ratio required by the final product, and the ratio deviation is within 2%. Different light homogenizing devices are physically separated, and the gaps are separated by thin (thickness <1mm) structural parts, which must be opaque and can be coated with a reflective film.

[0020] The light window 104 is made of an opaque hard material with a hole in the middle. Preferably, the light window 104 is installed in close contact with the light homogenizing device group 103. The light window 104 is an optional installation component. If the boundary and size of the light homogenizing device group 103 are clear, the light window 104 can be omitted.

[0021] After the light source emits light through the collimating lens, it is emitted with a small divergence angle of less than 30°. After passing through the light homogenizer, a light spot with a roughly uniform illumination distribution is formed on the exit surface of the light homogenizer. Most of the light spot is emitted through the light window 104, and a small part is intercepted by the light window 104. The light emitted from the end face of the light window 104 is used as the input of the imaging optical path of the aircraft angle position indicator.

[0022] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0023] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and cannot be construed as limiting the present invention. For professionals in the field, the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the purpose and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An illumination optical path for an aircraft angular position indicator, as input to the imaging optical path of the indicator, characterized in that: include: A monochromatic light source group, a collimating lens group and a light homogenizing device group are arranged in sequence from front to back along the optical axis; the monochromatic light source of the monochromatic light source group, the collimating lens of the collimating lens group and the light homogenizing device of the light homogenizing device group are in a one-to-one correspondence; the collimating lens is used to collimate or quasi-collimate the outgoing light beam of the corresponding monochromatic light source, and the light homogenizing device is used to homogenize the outgoing light beam of the corresponding monochromatic light source; wherein the light homogenizing devices of the light homogenizing device group are physically isolated so as not to affect each other.

2. The illumination optical path for an aircraft angle position indicator according to claim 1, characterized in that: Further including: A light window is arranged along the optical axis behind the light homogenizing device group, and the light window is used to cut off the outgoing light beams of each of the monochromatic light sources.

3. The illumination optical path for an aircraft angle position indicator according to claim 2, characterized in that: The light window is fitted with the light homogenizing device.

4. The illumination optical path for an aircraft angle position indicator according to any one of claims 1 to 3, characterized in that: The monochromatic light source group comprises monochromatic light sources of two or more colors.

5. The illumination optical path for an aircraft angle position indicator according to claim 4, characterized in that: The monochromatic light source is an LED monochromatic light source or an LD monochromatic light source.

6. The illumination optical path for an aircraft angle position indicator according to any one of claims 1 to 3, characterized in that: The collimating lens is a TIR lens, a parabolic reflector, a combination of an ellipsoidal reflector and a positive lens, or a combination of an ellipsoidal reflector and a negative lens.

7. The illumination optical path for an aircraft angle position indicator according to any one of claims 1 to 3, characterized in that: The light homogenizing devices of the light homogenizing device group are separated by a non-light-transmitting structural component to achieve the physical isolation.

8. The illumination optical path for an aircraft angle position indicator according to claim 7, characterized in that: The non-light-transmitting structural component is plated with a reflective film.

Images