Hologram Exposure Machine Camera Alignment
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Solution Overview
Problem
Existing hologram exposure machines lack efficient and precise methods for adjusting beam guiding optics, relying on manual checks and separate power meters, which are time-consuming and prone to errors.
Innovation Solution
Incorporating a camera to optically capture the exposure area, allowing for real-time monitoring and adjustment of light beam position and intensity, eliminating the need for manual checks and power meters, and using a partially transparent coupling mirror to align the camera with the optical axis of the hologram exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If manual eye checking and separate power meters are used to adjust beam guiding optics, then the device complexity is reduced, but the adjustment time and error rate increase
Solution Approach 1:
The patent merges the functions of visual inspection and power measurement into a single integrated camera system. The camera captures both the spatial position of the light beam and its intensity distribution, eliminating the need for separate power meters and manual eye checking. This integration reduces adjustment time while maintaining comprehensive monitoring capabilities.
Solution Approach 2:
The camera creates an optical copy (image) of the light beam's position and intensity distribution in the exposure area. This digital representation allows for precise measurement and monitoring without requiring direct manual inspection or separate measurement devices, thereby reducing adjustment time and improving accuracy.
2Measurement precision
If a camera is integrated to optically capture the exposure area for real-time monitoring, then the measurement precision and productivity are improved, but the device complexity increases
Solution Approach 1:
The camera system performs multiple functions simultaneously: it monitors the position of the light beam, measures its intensity distribution, and provides real-time visual feedback for adjustment. This multi-functionality achieves high measurement precision for both position and intensity without requiring multiple separate devices, thereby managing complexity effectively.
3Manufacturing precision
If a partially transparent coupling mirror is used to align the camera with the optical axis, then the manufacturing precision and ease of operation are improved, but the device complexity increases
Solution Approach 1:
The partially transparent coupling mirror acts as an intermediary element that allows the camera to be positioned outside the main light beam path while still capturing accurate images of the exposure area. This intermediary component enables precise optical axis alignment without requiring the camera to be directly in the beam path, simplifying the overall system configuration.
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 configuration enables precise and efficient adjustment of the hologram exposure machine, reducing the risk of errors and improving the quality of hologram production by allowing for live process monitoring and automatic correction of light beam alignment and intensity distribution.
Implementation Method 1
a camera (344) configured to optically capture the exposure area (204)
Implementation Method 2
a coupling mirror (340) configured to deflect the spatially modulated light from the light modulator (314) towards the master (104)
Implementation Method 3
a spatial light modulator (314) configured to receive light from the light source (304A, 304B), from a part of the beam-guiding optic (306), or from a second light source and to return spatially modulated light
Implementation Method 4
a beam-guiding optic (306) configured to guide the light emitted by the light source (304A, 304B)
Data Source
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AI summary
The invention relates to a hologram exposure machine (300) for introducing a volume reflection hologram into a film section (202) of a hologram film (200), comprising a light source (304A, 304B) for emitting light (400A, 400B), a beam guiding optic (306) for guiding the light (400A, 400B) emitted by the light source (304A, 304B), a spatial light modulator (314) configured to receive light (400A, 400B) from the light source (304A, 304B) or from a part of the beam guiding optic (306) and to return spatially modulated light (400A, 400B), and a master (104) for hologram exposure using the light (400A, 400B) returned by the light modulator (314). 400B) in an exposure area (204). The hologram exposure machine (300) comprises a camera (344) configured to optically detect the exposure area (204).The invention also relates to a method for adjusting a hologram exposure machine (300).