Light filter and spectrometer including the light filter

Patent metadata

Field	Value
Publication number	US-2020073032-A1
Application number	US-201916249592-A
Country	US
Kind code	A1
Filing date	Jan 16, 2019
Priority date	Aug 31, 2018
Publication date	Mar 5, 2020
Grant date	—

Abstract

Provided are a light filter and a spectrometer including the light filter. The light filter includes at least one filter, wherein the at least one filter includes a liquid spectrum modulation layer having different transmittance spectra according to different positions on the at least one filter. The liquid spectrum modulation layer has different thicknesses according to the different positions on the at least one filter.

First claim

What is claimed is:

1 . A light filter comprising:
at least one filter, wherein the at least one filter comprises a liquid spectrum modulation layer having different transmittance spectra according to different positions on the at least one filter.

2 . The light filter of claim 1 , wherein the liquid spectrum modulation layer has different thicknesses according to the different positions on the at least one filter.

3 . The light filter of claim 2 , wherein the at least one filter further comprises a filter frame comprising an inner space filled with the liquid spectrum modulation layer,
wherein the filter frame is formed of an optically transparent material.

4 . The light filter of claim 3 , wherein the filter frame comprises glass, quartz, or polymer.

5 . The light filter of claim 3 , wherein the inner space of the filter frame comprises a triangular, trapezoidal, or lens shaped cross section.

6 . The light filter of claim 1 , wherein the liquid spectrum modulation layer comprises a solution comprising a light absorption modulation material.

7 . The light filter of claim 6 , wherein the light absorption modulation material comprises at least one of quantum dots (QDs), inorganic materials, or polymers.

8 . The light filter of claim 1 , wherein the different transmittance spectra have a non-linear relation.

9 . The light filter of claim 1 , further comprising an anti-reflection layer provided on at least one of an upper surface and a lower surface of the at least one filter.

10 . The light filter of claim 1 , wherein the at least one filter further comprises a plurality of filters,
wherein each of the plurality of filters comprises a respective liquid spectrum modulation layer, and wherein the plurality of filters are arranged in an array on a same plane.

11 . The light filter of claim 10 , wherein the respective liquid spectrum modulation layers of the plurality of filters have different types of light absorption modulation materials or different sizes of light absorption modulation materials.

12 . The light filter of claim 1 , wherein the at least one filter further comprises a plurality of filters,
wherein each of the plurality of filters comprises a respective liquid spectrum modulation layer, and wherein the plurality of filters are arranged in a vertically overlapping form.

13 . The light filter of claim 12 , wherein the respective liquid spectrum modulation layers of the plurality of filters have different types of light absorption modulation materials or different sizes of light absorption modulation materials.

14 . The light filter of claim 13 , wherein ratios of the light absorption modulation materials at the different positions of the light filter are different according a characteristic of overlapping filters, among the plurality of overlapping filters, at the different positions of the light filter.

15 . The light filter of claim 1 , wherein the at least one filter further comprises a plurality of filters,
wherein each of the plurality of filters comprises a respective liquid spectrum modulation layer, and wherein the plurality of filters are arranged in an array on a same plane and are arranged in a vertically overlapping form.

16 . A spectrometer comprising:
a light filter comprising at least one filter; and a sensor configured to receive light transmitted through the light filter, wherein the at least one filter comprises a liquid spectrum modulation layer having different transmittance spectra according to different positions on the at least one filter.

17 . The spectrometer of claim 16 , wherein the liquid spectrum modulation layer has different thicknesses according to the different positions on the at least one filter.

18 . The spectrometer of claim 17 , wherein the at least one filter further comprises a filter frame comprising an inner space filled with the liquid spectrum modulation layer,
wherein the filter frame is formed of an optically transparent material.

19 . The spectrometer of claim 18 , wherein the filter frame comprises glass, quartz, or polymer.

20 . The spectrometer of claim 18 , wherein the inner space of the filter frame comprises a triangular, trapezoidal, or lens shaped cross section.

21 . The spectrometer of claim 16 , wherein the liquid spectrum modulation layer comprises a solution comprising a light absorption modulation material.

22 . The spectrometer of claim 21 , wherein the light absorption modulation material comprises at least one of quantum dots (QDs), inorganic materials, or polymers.

23 . The spectrometer of claim 16 , wherein the different transmittance spectra have a non-linear relation.

24 . The spectrometer of claim 16 , wherein the light filter further comprises an anti-reflection layer provided on at least one of an upper surface and a lower surface of the at least one filter.

25 . The spectrometer of claim 16 , wherein the at least one filter further comprises a plurality of filters,
wherein each of the plurality of filters comprises a respective liquid spectrum modulation layer, and wherein the plurality of filters are arranged in an array on a same plane.

26 . The spectrometer of claim 25 , wherein the respective liquid spectrum modulation layers of the plurality of filters have different types of light absorption modulation materials or different sizes of light absorption modulation materials.

27 . The spectrometer of claim 16 , wherein the at least one filter further comprises a plurality of filters,
wherein each of the plurality of filters comprises a respective liquid spectrum modulation layer, and wherein the plurality of filters are arranged in a vertically overlapping form.

28 . The spectrometer of claim 27 , wherein the respective liquid spectrum modulation layers of the plurality of filters have different types of light absorption modulation materials or different sizes of light absorption modulation materials.

29 . The spectrometer of claim 28 , wherein ratios of the light absorption modulation materials at the different positions of the light filter are different according a characteristic of overlapping filters, among the plurality of overlapping filters, at the different positions of the light filter.

30 . The spectrometer of claim 16 , wherein the at least one filter further comprises a plurality of filters,
wherein each of the plurality of filters comprises a respective liquid spectrum modulation layer, and wherein the plurality of filters are arranged in an array on a same plane and are arranged in a vertically overlapping form.

31 . The spectrometer of claim 16 , wherein the sensor comprises an image sensor or a photodiode.

32 . The spectrometer of claim 16 , wherein the spectrometer has a resolution less than or equal to 1 nm.

33 . A light filter comprising:
a filter frame; and a liquid spectrum modulation layer provided inside a cavity of the filter frame, wherein the filter frame has a first thickness at a first position on the filter frame and a second thickness at a second position on the filter frame according to different transmittance spectra.

34 . The light filter according to claim 33 , wherein the filter frame comprises:
a bottom portion and a top

Assignees

• Samsung Electronics Co Ltd

Inventors

• Cho Kyungsang
• Baik Chanwook

Classifications

• G01J3/0259

  Monolithic · CPC title

• G01J3/2803 Primary

  using photoelectric array detector · CPC title

• G02B1/11

  Anti-reflection coatings · CPC title

• G02B5/201 Primary

  in the form of arrays · CPC title

• G01J3/28 Primary

  Investigating the spectrum (using colour filters G01J3/51) · CPC title