Surgical Lamp Light Deflection Element for Shadowless Illumination
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Solution Overview
Problem
Surgical lamps require multiple lighting units to achieve a shadowless effect, leading to increased weight, material cost, and installation complexity, as well as inefficiencies in light utilization due to high requirements on irradiation angles and positioning.
Innovation Solution
A light-emitting device with a reflective shade and a light deflection element that collects and adjusts lateral light from a single or multiple light sources, allowing for efficient light convergence into a predetermined spot without the need for multiple units, using a nested column cylinder structure with concave-convex surfaces to adjust the air gap and change the light spot size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple lighting units are distributed inside the lamp head to achieve shadowless effect, then the shadowless illumination is improved, but the weight, material cost and installation complexity are increased
Solution Approach 1:
The patent merges multiple lighting units into a single integrated lighting unit that combines a light source, reflective shade, and light deflection element. This single unit performs the function previously requiring multiple separate units, thereby reducing installation complexity while maintaining shadowless illumination capability through the coordinated optical components
Solution Approach 2:
The patent introduces a light deflection element as an intermediary component between the light source and reflective shade. This element redirects lateral light onto the reflective shade, enabling a single lighting unit to achieve the shadowless effect that previously required multiple units distributed throughout the lamp head
2Illumination intensity
If multiple lighting units are used with high requirements on irradiation angle, then the light intensity distribution is improved, but the positioning and installation structure requirements are increased
Solution Approach 1:
The patent combines the light source, reflective shade, and light deflection element into a single pre-assembled lighting unit. This integration eliminates the need for precise positioning of multiple separate units, as the internal geometry of the combined unit inherently controls the irradiation angles and light intensity distribution without requiring high external positioning precision
Solution Approach 2:
The patent uses the light deflection element to change the propagation direction parameter of lateral light, redirecting it onto the reflective shade. This parameter change enables the single integrated unit to achieve proper light intensity distribution without requiring precise positioning of multiple units, as the optical parameters are controlled internally by the deflection element's geometry
3Area of stationary object
If the size of light spot is adjusted by changing irradiation angle of lighting unit, then the light intensity distribution is changed, but the device complexity and installation requirements are increased
Solution Approach 1:
The patent makes the lighting unit adjustable by enabling rotation of the light deflection element relative to the light source. This dynamic adjustment allows the irradiation angle to be changed to vary the light spot size on the surgical region, providing flexibility without requiring complex external adjustment mechanisms or multiple fixed-position units
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 solution enhances light utilization, reduces shadow zones, and simplifies installation by using a single optical system to create a shadowless effect, increasing the surgical lamp's light-emitting area and maintaining a shadowless illumination even with obstructions, while allowing for easy adjustment of light spot size.
Implementation Method 1
the light deflection element adjusts the light propagation direction of the lateral light projected on the light deflection element, such that the lateral light exited from the light deflection element is projected onto the reflector body
Implementation Method 2
the reflector body reflects the lateral light projected on the reflector body, and the lateral light exited from the reflector body converges into a light spot of a predetermined size
Implementation Method 3
the first column cylinder is capable of moving relative to the second column cylinder, thereby changing the shape of the air gap
Data Source
Figure 1
Figure 2~3A
Figure 3B~3C
AI summary
A light-emitting device (100), comprising: a light source (1), a light deflection element (2) and a reflective shade (3); the reflective shade (3) comprises a top end (301), a bottom end (302) which is provided with an annular opening, and a reflector body (303) which gradually expands from the top end (301) to the bottom end (302), the reflector body (303) being symmetrical about a central axis; the light source (1) is located at the top end (301) of the reflective shade (3) and faces the bottom end (302) of the reflective shade (3), and may emit forward light and side light; the light deflection element (2) is located between the light source (1) and the reflective shade (3), and the light deflection element (2) is used for collecting the forward light and the side light, adjusting the deflection direction of the forward light and the side light such that the forward light and the side light which emerge from the light deflection element (2) are projected to an inner side of the reflector body (303) of the reflective shade (3); the reflective shade (3) then mixes and reflects a light beam, and finally light rays from different positions of the reflective shade (3) are superposed at a desired position to form a desired light spot. By using such the light-emitting device (100), a surgical lamp having no shadow effect may be made.