Oblique Illuminating Module Design for Optical Ghosting Elimination
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Solution Overview
Problem
Optical apparatuses often suffer from image ghosting due to reflections between the illuminating module and subsequent optical elements, which degrade viewing quality.
Innovation Solution
The optical apparatus is designed such that the light beam emitted by the illuminating module intersects with its central axis at an angle, preventing reflections and utilizing a light guiding module with an oblique incident angle to avoid image ghosting, while incorporating a light source assembly, collimated element, light uniformizer, and beam combiner to ensure proper image formation and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the light beam is configured to vertically enter the optical modulation module, then the design is convenient for manufacturing and alignment, but numerous reflections occur between the optical modulation module and subsequent optical elements causing image ghosting
Solution Approach 1:
The patent applies asymmetry by configuring the light beam to enter the optical modulation module at an oblique angle rather than vertically. This asymmetric incident angle breaks the symmetry of light reflection paths, preventing the formation of ghost images while maintaining manufacturing feasibility through adjusted optical element positioning.
Solution Approach 2:
The patent changes the incident angle parameter of the light beam from 0 degrees (vertical) to a non-zero oblique angle. This parameter modification alters the light propagation and reflection characteristics, eliminating multiple reflections that cause image ghosting while preserving the core functionality of the optical system.
2Object-affected harmful factors
If the light beam travels at an oblique angle to avoid image ghosting, then viewing quality is improved, but the optical path complexity and system design difficulty increase
Solution Approach 1:
The patent resolves the increased optical path complexity by introducing a dimensional adjustment in the optical element positioning. By carefully positioning subsequent optical elements at specific three-dimensional coordinates, the patent compensates for the oblique light path, maintaining a compact overall structure despite the angled incident beam.
3Volume of moving object
If the light beam is configured to vertically enter the optical modulation module, then the optical path is simple and compact, but reflections cause image ghosting that degrades viewing quality
Solution Approach 1:
The patent maintains system compactness while eliminating image ghosting by using asymmetric optical element positioning. The subsequent optical elements are positioned at specific asymmetric coordinates that accommodate the oblique light path without significantly increasing the overall system volume, thus resolving the contradiction between compactness and ghosting elimination.
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 effectively eliminates image ghosting, enhances viewing quality, and reduces the volume and complexity of the system by ensuring the image beam enters the light guiding module at a controlled angle, maintaining image integrity.
Implementation Method 1
The first lens unit has a first lens optical axis, wherein the light beam passing through the first lens unit is formed to be an illuminating beam
Implementation Method 2
an optical modulation module and a light guiding module, the illuminating beam passes through the optical modulation module to be an image beam having an image
Implementation Method 3
the image beam travels in the light guiding module, leaves the light guiding module and is received by user's eyes
Data Source
AI summary
An illuminating module includes a light source assembly which includes a first lens unit. The light source assembly is configured to produce an illuminating beam, wherein the optical apparatus includes an optical modulation module and a light guiding module, the optical modulation module is parallel corresponding to the first lens unit, the illuminating beam passes through the optical modulation module to be an image beam having an image, and the image beam travels in the light guiding module, and leaves the light guiding module. The illuminating beam obliquely enters the optical modulation module.