Close-up Camera Lens Illumination for Depth of Field
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Solution Overview
Problem
Close-up photography with digital cameras often results in inadequate light due to the camera lens blocking surrounding light, leading to issues like camera shake, poor resolution, and a narrow depth of field, which are difficult to overcome with existing solutions such as slow shutter speeds, high ISO films or settings, and external flashes.
Innovation Solution
A close-up photograph device with a compact body housing a close-up lens and an illuminating device, such as light-emitting diodes, surrounding the lens to provide even illumination, allowing for adjustable brightness control and integration with camera equipment to maintain high shutter speeds without camera shake or low resolution issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the shutter opening time is lengthened to achieve sufficient exposure value, then enough light can project to the light recording device, but the possibility of camera shock increases and both negative films and power are wasted
Solution Approach 1:
The patent introduces an illuminating device as an intermediary light source positioned between the camera lens and the object. This mediator provides additional light to the object without requiring the camera lens to be positioned far from the object, thus avoiding the lens blocking surrounding light while still achieving sufficient exposure without camera shock
Solution Approach 2:
The illuminating device is activated before the shutter opens to pre-illuminate the object. This preliminary lighting action ensures that when the shutter opens, sufficient light is already available from the object's reflection, eliminating the need for long shutter times and preventing camera shock
2Illumination intensity
If the aperture of the diaphragm is increased to allow more light passing through the lens, then more light reaches the light recording device, but the resolution and contrast of the lens deteriorate and the depth of field becomes very narrow
Solution Approach 1:
The illuminating device serves as a mediator that provides light to the object independently of the lens aperture. This allows the diaphragm to remain at a smaller aperture for maintaining resolution and contrast while the illuminating device compensates for the reduced light transmission by directly illuminating the object
Solution Approach 2:
The lighting function is segmented from the lens system. Instead of relying solely on the lens aperture to control light transmission, the patent separates the illumination function into a dedicated illuminating device, allowing the lens to maintain optimal aperture settings for resolution while the illuminating device handles the light delivery
3Illumination intensity
If the aperture of the diaphragm is increased to allow more light, then more light reaches the light recording device, but the depth of field becomes very narrow, making it impossible to photograph 3D objects with proper focus throughout
Solution Approach 1:
The illuminating device acts as a mediator that illuminates the entire object uniformly, allowing the lens to maintain a small aperture for deep depth of field. The mediator's light compensates for the reduced light transmission, enabling both narrow aperture and extended depth of field coverage for 3D objects
4Reliability
If a tripod is used to support the camera to prevent camera shock, then camera stability is improved, but the device becomes substantial in weight and not portable for traveling
Solution Approach 1:
The illuminating device is positioned as an intermediary between the lens and object, providing light that eliminates the need for long shutter times. This eliminates camera shock without requiring a tripod, maintaining device portability while improving reliability
Solution Approach 2:
The illuminating device is integrated into the camera system, allowing the camera to self-correct the lighting issue without external support equipment. The system provides its own illumination solution, eliminating the need for tripods and maintaining portability
5Speed
If high ISO films or increased sensitivity settings are used to elevate shutter speed, then camera shock is reduced, but the resolution and picture quality deteriorate due to greater particles and noise
Solution Approach 1:
The illuminating device is an intermediary light source that provides sufficient illumination to allow fast shutter speeds without requiring high ISO settings. This mediator's light enables high shutter speed while maintaining picture quality and resolution, avoiding the particle and noise issues of high ISO films
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 device ensures adequate illumination for deep depth of field without camera shake or low resolution, allowing for high-quality close-up images without the need for high ISO settings or external flashes, making it suitable for both professional and consumer use.
Implementation Method 1
an illuminating device mounted on the body and surrounding the lens device, such as light-emitting diodes
Data Source
AI summary
A photograph device is provided. The photograph device includes a body, a lens device mounted on the body, and an illuminating device mounted on the body and surrounding the lens device.