Ring Flash Positioning for Dental Photography
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Solution Overview
Problem
Conventional stroboscopic flash devices for digital cameras lack the ability to adjust flash unit positions precisely in multiple axes, making it difficult to achieve uniform lighting for objects of varying sizes, such as a patient's whole body or mouth in dentistry photography, and require skilled intuition for optimal setup.
Innovation Solution
A stroboscopic flash device with a ring-like holder and multiple stroboscopic flash unit holding bases, featuring circumferential, upward/downward, and rightward/leftward position adjustment mechanisms, along with click stop and position indication means to securely fix and indicate optimal flash unit positions relative to the object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If only circumferential position adjustment is provided, then the device structure remains simple, but uniform lighting cannot be achieved for objects of varying sizes
Solution Approach 1:
The position adjustment mechanism is segmented into three independent adjustment mechanisms: circumferential position adjustment, upward/downward position adjustment, and rightward/leftward position adjustment. Each mechanism handles one degree of freedom, allowing comprehensive position control while maintaining modular simplicity in each individual mechanism.
Solution Approach 2:
The invention adds two more adjustment dimensions (upward/downward and rightward/leftward) to the existing circumferential adjustment, transforming a one-dimensional adjustment system into a three-dimensional adjustment system. This enables precise positioning of flash units in space to achieve uniform lighting for various photographic parts.
2Measurement precision
If manual intuition-based setup is used, then the device operation remains simple, but positioning precision and consistency deteriorate
Solution Approach 1:
Optimal positions for different photographic parts (whole body, upper body, face, mouth) are predetermined and marked on the ring-like holder. Users simply need to align the flash units with the corresponding marks rather than calculating optimal positions, achieving high precision through pre-prepared reference markers.
Solution Approach 2:
The ring-like holder includes visual marks indicating optimal positions for different photographic parts. This provides immediate visual feedback to the operator, ensuring correct positioning without requiring expert knowledge or repeated adjustments.
3Illumination intensity
If fixed posture is used, then the device structure remains simple, but lighting uniformity for varying object sizes deteriorates
Solution Approach 1:
The flash unit holding bases are designed to be movable along the ring-like holder in the circumferential direction, while the flash units themselves can be swung upward/downward and rightward/leftward. This dynamic adjustability allows the system to adapt to different photographic scenarios while maintaining a relatively simple overall structure.
Solution Approach 2:
Each flash unit can be independently positioned in three directions (circumferential, upward/downward, rightward/leftward) to optimize lighting for specific photographic parts. This local optimization capability ensures uniform lighting across various object sizes and configurations.
Data Source
AI summary
A stroboscopic flash device for a digital camera having a plurality of stroboscopic flash units mounted on a ring-like holder provided removably attached to a lens barrel of the digital camera comprising a circumferential position adjustment mechanism to adjust a circumferential position of the two stroboscopic flash units along the ring-like holder, an upward and leftward position adjustment mechanism to adjust an upward and downward position of a flash face of the stroboscopic flash units and a rightward and leftward position adjustment mechanism to adjust a rightward and leftward position of the flash face of the stroboscopic flash units, the circumferential position adjustment, the upward and downward position adjustment mechanism and the rightward and leftward position adjustment mechanism being adapted to indicate the optimum stroboscopic flash positions relative to every photographic part of the photographic object by distinguishing them by a pointer corresponding to any of colored indication parts and to detect the optimum stroboscopic flash positions by click stop means.