Visible Light Absorbing Lens for Infrared Transmittance
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Solution Overview
Problem
Traditional optical lenses struggle to achieve high optical quality, particularly in allowing infrared light to pass through while effectively blocking visible light, due to deviations in surface coating materials at different light incident angles.
Innovation Solution
The optical image capturing system incorporates at least one lens with a visible light absorbing ingredient and an optical filter, both of which are designed to absorb visible light within the 400 nm to 700 nm wavelength range and allow infrared light (greater than 800 nm) to pass through, thereby enhancing light receiving efficiency and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If surface coating material is used to block visible light, then visible light blocking effect is improved, but optical quality deteriorates due to sensitive deviation at different incident angles
Solution Approach 1:
The patent changes the fundamental parameter of light interaction from reflection (surface coating) to absorption (bulk material). By incorporating visible light absorbing ingredients into the lens material itself, the system achieves angle-independent visible light blocking while maintaining optical quality, as absorption is an intrinsic property not sensitive to incident angle variations.
Solution Approach 2:
The patent uses composite materials by combining infrared-transmissive base material with visible light absorbing ingredients. This creates a multi-functional material that simultaneously blocks visible light through absorption and transmits infrared light, resolving the contradiction between visible light blocking and optical quality.
2Adaptability or versatility
If conventional optical lens is used, then general imaging is achieved, but infrared transmittance and visible light absorption cannot be simultaneously satisfied
Solution Approach 1:
The patent applies local quality by giving different parts of the optical system different optical properties. The lens material is specifically designed to be transparent to infrared wavelengths while absorbing visible wavelengths, creating localized spectral selectivity that enables simultaneous infrared transmittance and visible light blocking.
Solution Approach 2:
The patent changes the spectral response parameters of the lens material by adding visible light absorbing ingredients. This modifies the material's interaction with different wavelengths, enabling it to selectively transmit infrared light while absorbing visible light, thus achieving the desired adaptability for infrared applications.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively absorbs visible light and maintains high transmittance for infrared light, improving the light receiving efficiency and overall working quality of the optical image capturing system.
Implementation Method 1
The at least one lens includes at least one visible light absorbing ingredient; at least one lens correspondingly absorbs a visible light with a wavelength range from 400 nm to 700 nm
Implementation Method 2
allows a light with a wavelength range greater than 800 nm to correspondingly pass through the at least one lens
Implementation Method 3
At least one of an object-side surface, which faces the object side, of the at least one lens and an image-side surface, which faces the image side, of the at least one lens is aspheric
Data Source
AI summary
An optical image capturing system, along an optical axis from an object side to an image side, includes a lens and an optical filter. The lens has refractive power. The optical filter is adjacent to the lens. The lens and/or the optical filter include or includes at least one visible light absorbing ingredient, absorb or absorbs a visible light with a wavelength range from 400 nm to 700 nm, and allows a light with a wavelength range greater than 800 nm to pass correspondingly. In another embodiment, a plurality of lenses is provided. At least one of the lenses is a filter lens. The filter lens includes the at least one visible light absorbing ingredient, so that the optical image capturing system could absorb the visible light and has a high transmittance of the infrared, thereby improving a light receiving efficiency and a working quality.