Lens Mirror Array Slit Holder for Bend-Resistant Imaging
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Solution Overview
Problem
The SLA in a solid-state head is prone to bending due to its long resin structure, which leads to defocus issues, and increasing the holder's rigidity to prevent bending complicates its proximity to the photoconductive drum.
Innovation Solution
A holder with a slit design that accommodates a constricted portion of the lens mirror array, reducing the slit width to enhance rigidity while maintaining compactness and preventing bending, allowing the solid-state head to be positioned close to the photoconductive drum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the holder size is increased or a reinforcement member is attached to increase the rigidity of the holder, then the rigidity of the holder is improved, but the width of the holder increases making it difficult to dispose the solid-state head close to the photoconductive drum
Solution Approach 1:
The patent introduces a through-hole penetrating the holder in the width direction, creating a dimensional feature that provides structural reinforcement without increasing the external width of the holder. The through-hole allows strategic placement of reinforcement members that extend through the holder thickness, strengthening the structure in the width direction while maintaining compact overall dimensions suitable for close positioning to the photoconductive drum
2Manufacturing precision
If the SLA is made with long resin structure, then the focal length and optical performance are achieved, but the SLA becomes easily bent by external force causing defocus
Solution Approach 1:
The patent introduces a reinforcement member as an intermediary element that is inserted into the through-hole of the holder. This reinforcement member acts as a mediator that provides external support to the SLA, preventing it from bending under external forces while maintaining its long resin structure necessary for achieving the required focal length and optical performance
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 solution maintains high rigidity of the holder and lens mirror array, preventing bending and ensuring precise image formation without increasing the holder's size, thus enabling a compact and effective optical device.
Implementation Method 1
reflection surfaces that reflect the light made incident from the incident-side lens surfaces toward the emission-side lens surfaces
Implementation Method 2
incident-side lens surfaces on which light emitted from the light emitting section is made incident, emission-side lens surfaces that emit the incident light
Data Source
AI summary
An optical device according to an embodiment includes a lens mirror array and a holder. The lens mirror array is opposed to a light emitting section. The lens mirror array includes a plurality of optical elements. The optical elements include incident-side lens surfaces, emission-side lens surfaces that emit incident light, and reflection surfaces that reflect incident light. A cross section orthogonal to a first direction of the lens mirror array has a constricted shape. The holder includes a slit having width smaller than width of both the ends in the cross section of the lens mirror array and larger than width of the center in the cross section and extending in the first direction. The holder holds the lens mirror array in a state in which a constricted portion in the center in the cross section of the lens mirror array is disposed in the slit.