WO2022115091A1

WO2022115091A1 - Multiple field of view points

Info

Publication number: WO2022115091A1
Application number: PCT/TR2021/051289
Authority: WO
Inventors: Bilgen Birkan KURŞUN; Doğan Uğur SAKARYA
Original assignee: Roketsan Roket Sanayi̇i̇ Ti̇caret A.Ş.
Priority date: 2020-11-26
Filing date: 2021-11-25
Publication date: 2022-06-02
Also published as: TR202019076A2

Abstract

This invention relates to a system that enables obtaining multiple field of view points by applying different voltage differences with a single optic structure.

Description

MULTIPLE FIELD OF VIEW POINTS

Technical field of invention

State of the art

Optical systems are used to create and record the images of objects or scenes. These systems generally work with variable magnification and provide more than one field of view. This allows the systems to obtain image data that can be continuous or divergent between narrow, medium and wide fields of view. Variable magnification can be obtained by moving one or more optical components throughout an imaging axis to change the field of view. Moving an intermediate lens throughout an imaging axis requires precision for the lens to be able to be aligned. Aligning the lens precisely takes a long time and causes shortage of time.

Application no “W02007047769A2” in the state of the art was reviewed. The invention that is the subject to the application relates to apparatus and methods to obtain images particularly in more than one field of view. The invention has a compact, dispersed, multi-view optical system that has a flexible geometry and provides the selection of an appropriate rotational axis.

Application no “US20110188139A1” in the state of the art was reviewed. The invention that is the subject of the application relates to an optical system that has multiple fields of view to image an object and has a fully reflecting design. Optical system comprises having a number of different configurations for laser range finding and determining the components.

Application no “TR2020/08657” in the state of the art was reviewed. The invention that is the subject of the application is a multi-beam LIDAR optical system that comprises multiple single-mode optic fibres configured to transmit and receive light-beams and multiple lenses configured to search and focus the light-beams between the multiple single-mode optic fibres and an inlet opening of the system; wherein, the system is configured to transmit and receive the light-beams over a 5° angular field of view.

In the methods in the prior art, a system that allows reducing the systems composed multiple optical structures to a single lens, reducing the number of moving parts to only a detector and forming multiple field of view configurations is not disclosed.

Conclusively, due to the above described problems and the insufficiency of the existing solutions made it necessary to make an improvement in the relevant technical field.

The Aims of the Invention

The most important aim of the invention is to provide a larger and smaller effective focal length with the mix the refractive index of which is changed.

Another important aim of the invention is to provide field of view point values in the intermediate values.

Another aim of the invention is to enable reducing the systems composed of multiple optical structures to a single lens.

Another aim of the invention is to ensure that the moving parts are eliminated or reduced only to the detector when required.

Another aim of the invention is to provide mountability and the ease to be positioned on the optical axis.

The structural and characteristic properties and all advantages of the invention will be more clearly understood with the figures given below and the detailed description written with reference to these figures. Therefore, the assessment should also be made by taking these figures and the detailed description into account.

Description of Drawings

Figure-1 ; is the drawing providing the image of the multiple view point system that is the subject of the invention.

Figure-2; is the graphic providing the change in the refractive index of the water depending on the wavelength.

Figure-3; is the graphic providing the change in the refractive index of the NaCI depending on the wavelength.

Reference numbers

100. Multiple view point system

110. Mix

120. Container

130. Generator

140. Detector

150. Beam

Description of the Invention

This invention relates to a system that enables obtaining multiple field of view points by applying different voltage differences with a single optic structure. The multiple field of view point system (100) comprises the mix (110), container (120), generator (130), detector (140) and the beam (150).”

The mix (110) comprises a material at least one admixture of which can be ionised and has a different refractive index than the other admixtures in the mix (110). The mix (110) can be formed with all material combinations, all materials of which can be dissolved within one another and one material of which can be ionised. In one embodiment of the invention, the mixture (110) is formed with water and NaCI (sodium chloride) that can be ionised, both of which can be dissolved within each other. The mix (110) is prepared by selecting material in accordance with the wavelength dependent refractive index of the beam (150) to be used. The container (120) contains the mix (110) in it and comprises being made of a material in a permeable structure depending on the wavelength of the beam (150) prepared by the mix (110). The container (120), comprises surfaces on its upper and lower ends enabling to apply voltage differences.

The generator (130) enables applying high voltage differences to the surfaces on the lower and upper ends of the container (120). The generator (130) ensures that the admixture that can be ionised moves away from the central parts of the mix (110) and is drawn to polars with voltage differences at the bottom and top of the container (120) by applying high voltage difference. By this way, obtaining a bigger effective focal length is ensured with the mix (110) the refractive index of which is changed. As a result, a system with a narrow field of view point is obtained. The generator (130) then removes the high voltage difference and enables the admixture to get mixed into the mix (110) again. By this way, a different refractive index is obtained and a smaller effective focal length is provided. As a result, an optical structure with wide field of view point is ensured. The generator (130) ensures obtaining also the field of view point values within the intermediate values by applying different mounts of voltage values such as narrow and wide view points.

The detector (140), in the case where the back focal length cannot be held in the same place, enables the detector (140) to be placed on an engine-driven structure and moved to the place where the new focal length is. The beam (150) ensures the generation of visible, near infra-red, middle infra-red or far infra-red wavelengths. Depending on the wavelength the beam (150) generates, material to be included into the mix (110) is chosen in accordance with the refractive index. The materials chosen for the mix (110) can be dissolved within one another and comprises an admixture that can be ionised.

With the multiple field of view point system (100), the system composed of multiple optical structure is reduced to one single lens. Also, it also ensures that the number of moving parts is reduced only to the detector (140), if required. With the multiple field of view point system (100), creating much more configurations than those three configurations mentioned above will be possible. It also provides mountability and ease to be placed on the optical axis.

The beam (150) enters into the multiple field of view point system (100) shown in Figure 1 through the container (120) that contains the mix (110). The beam (150) entering into the multiple field of view point system (100) passes through the container (120) containing the mix (110) and reaches to the detector (140). Located in the body of the system, the detector (140), when the back focal length cannot be held in the same place in the current structure, is moved to where the new focal length is by being placed on an engine-driven structure, thereby changing the focal length of the beam (150). Meanwhile, the admixture that can be ionised is moved away from the central parts of the mix (110) and is drawn to polars with voltage differences at the bottom and top of the container (120) by applying high voltage difference. By this way, a bigger effective focal length is obtained with the mix (110) the refractive index of which is changed and thereby a system that has a narrow field of view point is obtained. The generator (130) then removes the high voltage difference and enables the admixture to get mixed into the fluid again, thereby obtaining an optical structure with a wide field of view point via a smaller effective focal length is ensured.

In Figures 2 and 3, the change in the refractive index of NaCI (sodium chloride) and of water, respectively, depending on the wavelength are shown. In an embodiment of the invention, said structure can be formed exemplarily with a mix (110) as a combination of NaCI and water in the visible region. The refractive indexes of NaCi and water are given on the figures. The refractive indexes of NaCi and water are different and NaCi can be ionised when voltage is applied.

Claims

1. A multiple field of view points system (100) enabling obtaining images in more than one field of view points, comprising; a mix (110) comprising a material at least one admixture of which can be ionised and has a different refractive index than the other admixtures in the mix (110), a container (120) containing the mix (110) in it and comprising being made of a material in a permeable structure depending on the wavelength of the beam (150) prepared by the mix (110), a generator (130) enabling applying high voltage differences to the surfaces on the lower and upper ends of the container (120), a detector (140), in the case where the back focal length cannot be held in the same place, enabling the detector (140) to be placed on an engine-driven structure and moved to the place where the new focal length is, a beam (150) ensuring the generation of visible, near infra-red, middle infra-red or far infra-red wavelengths.

2. Multiple field of view points system (100) according to Claim 1, comprising the mix (110) prepared by choosing a material in accordance with the wavelength dependent refractive index of the beam (150) to be used.

3. Multiple field of view points system (100) according to Claim 1, comprising at least one container (120) having surfaces on the lower and upper ends enabling the application of voltage difference.

4. Multiple field of view points system (100) according to Claim 1, comprising the generator (130) ensuring that the admixture that can be ionised moves away from the central parts of the mix (110) and is drawn to polars with voltage differences at the bottom and top of the container (120) by applying high voltage difference.

5. Multiple field of view points system (100) according to Claim 1, comprising the generator (130) that removes the high voltage difference and ensures a smaller effective focal length by obtaining a different refractive index through enabling the admixture to get mixed into the mix (110) again.

6. Multiple field of view points system (100) according to Claim 1, comprising the generator that enables obtaining the view point values within the intermediate values by applying voltage values in different amounts.