Optical Module with Concave Recess and Aspherical Lens for UV LED
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Solution Overview
Problem
The luminous intensity of ultraviolet light emitting diodes (UV LEDs) is low, requiring an improvement in optical modules to enhance their performance for applications such as sterilization and exposure apparatuses.
Innovation Solution
An optical module design featuring a concave recess with a light emitting diode and an optical lens system that includes a convex curved surface and specific beam angle control, achieving a beam spread angle of 15 degrees or less, which improves the light concentration and reduces the number of UV LEDs needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional optical modules with wide beam spread are used, then the coverage area is large, but the luminous intensity is low
Solution Approach 1:
The patent employs a lens with a convex curved surface to refract and concentrate light rays. The curved surface geometry is specifically designed to transform the wide beam spread from the UV LED into a narrow, concentrated beam with 15 degrees or less beam spread angle, thereby increasing luminous intensity in the target direction
Solution Approach 2:
The patent changes the optical parameters by using a lens with specific curvature radius and refractive index to control the light propagation. The lens transforms the angular distribution of light from wide spread to narrow concentration, achieving beam spread angle of 15 degrees or less while maintaining high luminous intensity
2Illumination intensity
If multiple UV LEDs are used to increase luminous intensity, then the light output is sufficient, but the device complexity increases
Solution Approach 1:
The patent introduces an optical lens as an intermediary component between the UV LED and the target object. This single lens effectively concentrates the light from one UV LED to achieve luminous intensity comparable to or exceeding multiple UV LEDs, thereby simplifying the device structure while maintaining high light output
3Ease of manufacture
If a simple lens structure is used, then the manufacturing is easy, but the beam angle control is insufficient
Solution Approach 1:
The patent uses a lens with a convex curved surface where the curvature radius is specifically designed to achieve precise beam angle control. The curved geometry naturally refracts light rays at precise angles, achieving beam spread of 15 degrees or less through geometric optics rather than complex active control mechanisms
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
The optical module achieves a narrower beam spread angle, enhancing the reliability of exposure apparatuses and improving the luminous intensity of UV LEDs, thereby increasing their effectiveness in applications like sterilization and curing.
Implementation Method 1
an optical lens including an incidence portion disposed on the body and a lens portion having a convex curved surface on the incidence portion
Implementation Method 2
a body including a concave recess and a side surface having an outwardly concave curved surface at a periphery of the recess
Data Source
AI summary
An optical module disclosed in an embodiment includes: a body including a recess recessed at a predetermined depth from an upper surface thereof and a side surface having an outwardly concave curved surface at a periphery of the recess; a light emitting module having a light emitting diode at a lower portion of the recess of the body; and an optical lens including an incidence portion disposed on the body and a lens portion having an aspherical shape on the incidence portion, and wherein an upper portion of the recess has a maximum first diameter, a lower portion of the lens portion has a maximum second diameter, and the second diameter is smaller than the first diameter.