Optical Device Beam Splitter for Image Display
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Solution Overview
Problem
Existing image display apparatuses, such as projectors, face challenges in accurately detecting the state of light beams, particularly in high-accuracy applications like digital cinema and 3D picture projection, where precise light beam detection is crucial for image quality and component alignment.
Innovation Solution
The implementation of an image display apparatus that includes an optical modulator, an optical device capable of splitting a modulated light beam into two separate beams traveling in different directions, and a sensor unit positioned on the optical path of one beam to detect its state, preventing backward-traveling light from interfering with the other beam, thereby enhancing detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If a sensor unit is disposed on the optical path to detect light beam state, then detection capability is improved, but backward-traveling light on the optical path causes noise and reduces measurement precision
Solution Approach 1:
The optical device divides the modulated light beam into separate first and second split light beams traveling in different directions. The sensor unit detects the second split light beam on its dedicated optical path, while the first split light beam travels along a separate optical path, preventing noise interference and enabling high-accuracy detection of light intensity, chromaticity, and luminous flux shape.
Solution Approach 2:
The optical device acts as an intermediary that splits the modulated light beam into two separate paths. This mediator prevents backward-traveling light on one optical path from interfering with the detection of the other beam, allowing the sensor unit to accurately detect the second split light beam without noise from the first split light beam.
2Measurement precision
If an optical device splits light beams into separate paths, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The optical device performs multiple functions: it splits the modulated light beam into first and second split light beams traveling in different directions, prevents backward-traveling light interference, and enables the sensor unit to detect the second split light beam. This multi-functional design achieves high detection accuracy while maintaining reasonable device complexity.
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 allows for high-accuracy detection of light beam states, reducing noise components and improving the sensing accuracy of light intensity, chromaticity, and luminous flux shape, leading to enhanced image quality and reduced maintenance costs by enabling timely replacement of optical components.
Implementation Method 1
an optical device that splits a modulated light beam modulated by the optical modulator into a first split light beam and a second split light beam, the first split light beam and the second split light beam each travelling in a different direction
Implementation Method 2
a sensor unit that is disposed on the optical path of the second split light beam and detects a state of the second split light beam
Data Source
AI summary
An image display apparatus according to an embodiment of the present technology includes an optical modulator, an optical device, and a sensor unit. The optical device splits a modulated light beam modulated by the optical modulator into a first split light beam and a second split light beam, the first split light beam and the second split light beam each travelling in a different direction, and prevents a light beam, which backwardly travels on an optical path of the first split light beam and enters the optical device, from travelling along an optical path of the second split light beam. The sensor unit is disposed on the optical path of the second split light beam and detects a state of the second split light beam.