Galvanometer Mirror Assembly for Anamorphic Film Recording
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Solution Overview
Problem
Existing image-to-film transfer technologies face limitations in speed and precision, particularly when recording high-resolution images, as they require complex film drives and controls, leading to slow scanning rates and potential image defects.
Innovation Solution
A method and apparatus using two independent galvanometer-controlled mirrors to direct laser beams onto film media, allowing for precise and rapid scanning, and converting digital images with square pixels into anamorphic representations for efficient recording, which includes a laser film recorder with modulators and a mirror assembly to output modulated laser signals for anamorphic image formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single galvanometer-controlled mirror is used to direct the laser beam, then the system structure is simpler, but the scanning speed and precision are insufficient for high-resolution film recording
Solution Approach 1:
The patent divides the beam deflection function into two independent galvanometer-controlled mirrors: one for horizontal scanning and one for vertical scanning. This segmentation allows each mirror to operate independently, achieving high scanning speeds and precision required for high-resolution film recording (4000×4000 pixels or more), while maintaining manageable system complexity through functional decomposition.
2Manufacturing precision
If the laser beam is directed in scan line sequential fashion to generate composite images, then color images can be recorded, but the recording time per frame becomes excessively long (50 seconds)
Solution Approach 1:
The patent implements continuous scanning in both horizontal and vertical directions using two independent galvanometer-controlled mirrors operating simultaneously. This continuous action in multiple dimensions allows the laser beam to cover the entire film frame much faster than sequential scan-line methods, reducing recording time from 50 seconds to approximately 5 seconds per frame while maintaining high-resolution image quality.
3Manufacturing precision
If thousands of pixels or spots are individually exposed on film for high resolution, then image quality improves, but the exposure speed must be extremely high to complete motion picture frames
Solution Approach 1:
The patent transitions from one-dimensional sequential scanning to two-dimensional simultaneous scanning by introducing a second galvanometer-controlled mirror. This dimensional expansion allows the laser beam to rapidly traverse both horizontal and vertical axes concurrently, achieving the high exposure speeds necessary for individually exposing thousands of pixels (4000×4000 or more) while maintaining high resolution required for motion picture frames.
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 approach significantly reduces the time to record each frame from 50 seconds to about 5 seconds, enhances image transfer speed and quality, and results in sharper images by eliminating the need for digital resizing, thereby improving the overall efficiency and reliability of the film recording process.
Implementation Method 1
a first galvanometer controlled mirror and a second galvanometer controlled mirror in the film transfer device
Implementation Method 2
the laser beam is selectively directed at different areas of the frame of film
Implementation Method 3
light is selectively introduced to the film in different areas over time, such that the effect of the combined exposures is a composite image
Implementation Method 4
a laser beam is focused upon a frame of film
Data Source
AI summary
A method for a film transfer device includes receiving a digital image in the film transfer device, wherein the digital image comprises a plurality of square pixels, wherein the digital image comprises a first number of pixels in a horizontal direction and a second number of pixels in a vertical direction, and wherein the digital image comprises a non-anamorphic version of an image, and optically converting the digital image into an optical output image to film media in the film transfer device, wherein the optical output image is associated with a plurality of non-square pixels, wherein the optical output image is associated with the first number of pixels in the horizontal direction and the second number of pixels in the vertical direction, and wherein the optical output image comprises an anamorphic version of the image.