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Infrared Cut Filters with Red Absorbing Layers for Digital Cameras

A technology of infrared cutoff and filter, applied in the field of digital cameras

Active Publication Date: 2018-05-22
OMNIVISION TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, IR cut filters can cause other problems as described in the following sections

Method used

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  • Infrared Cut Filters with Red Absorbing Layers for Digital Cameras
  • Infrared Cut Filters with Red Absorbing Layers for Digital Cameras
  • Infrared Cut Filters with Red Absorbing Layers for Digital Cameras

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Experimental program
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Embodiment Construction

[0019] An embodiment of an IR cut filter used in a digital camera is described. Numerous specific details are described to provide a thorough understanding of embodiments of the invention, but those skilled in the relevant art will recognize that the invention may be implemented without one or more of these specific details, or by other means. , components, materials, etc. to practice. In some instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring certain aspects, but are still encompassed within the scope of the invention.

[0020] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one of the described embodiments. Thus, appearances of the phrase "in one embodiment" or "in an embodiment" in this specification are not necessarily all referring to the same embodi...

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PUM

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Abstract

An infrared cut filter may be used with an image sensor to remove infrared light components from image light received from a first side of the infrared cut filter prior to the image light reaching the image sensor to be disposed on a second side of the infrared cut filter. The infrared cut filter includes at least one red absorbing layer and an infrared reflector. The at least one red absorbing layer partially absorbs red light components within the image light. The infrared reflector reflects the infrared light components. The infrared reflector is disposed between the red absorbing layer and the first side of the infrared cut filter while the at least one red absorbing layer is disposed between the infrared reflector and the second side of the infrared cut filter.

Description

technical field [0001] This disclosure relates generally to digital cameras, and in particular, but not exclusively, to infrared ("IR") cut filters for use in digital cameras. Background technique [0002] Digital cameras are ubiquitous. It is used in a wide variety of devices, from expensive and complex equipment to cellular phones and web cameras. A digital still camera or video camera includes at least one imaging lens and an image sensor. Typically, the image sensor is a complementary metal-oxide-semiconductor ("CMOS") image sensor, although a charge-coupled device ("CCD") image sensor is also possible. The imaging lens forms an image at the image sensor. Such image sensors typically include millions of pixels, or light-sensing elements, sensitive to one of three primary colors (eg, red, green, and blue). Each pixel detects and converts the light intensity at that pixel into an electrical signal. Therefore, a color image formed by the imaging lens is detected and co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B17/12G03B11/04G02B5/28H04N5/225
CPCG02B5/282G03B11/00
Inventor 高路李洪军
Owner OMNIVISION TECH INC