&lt;title&gt;Optimization glitches in zoom lens design&lt;/title&gt;

Neil, Iain A.

doi:10.1117/12.284237

Cited by 5 publications

(2 citation statements)

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“…High-end optical inspection instruments are widely used in interferometric inspection and astronomy, as well as in microscopes, spectrometers, and cameras. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] The key factor affecting inspection precision is the magnification of a lens module. In an inspection instrument, a lens module comprising short-focus lenses can achieve magnification of 1000×.…”

Section: Introductionmentioning

confidence: 99%

On-line process decisions using convolutional neural network for centering high-precision short-focus lens

2021

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This study integrated the use of a centering machine with an automatic optical axis measuring technique to improve the centering process for short-focus lenses, which are widely used in interferometric inspection, microscopy, and spectrometry. A major concern of the centering process is coma aberrations during the axis centering of a lens, which leads to deformation of the image system. Because of the small size and high curvature of short-focus lenses, high optical axis error and unstable grinding quality are highly problematic within the high-precision centering process. To reduce optical axis error and improve manufacturing quality, an on-line optical axis measuring system that applies convolutional neural network (CNN) machine learning for the evaluation of centering stability was developed. According to experimental results, the CNN achieved 95% accuracy. With the use of trace classification and optical axis measurements, the optical axis error was controlled to <150 μrad, the range of cracks to

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Section: Introductionmentioning

confidence: 99%

On-line process decisions using convolutional neural network for centering high-precision short-focus lens

2021

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“…The zoom is one common function in optical imaging systems while the varifocal mechanism acts as the enforcement [2,3] . Though the varifocal optical system has made great progress in decades, it still has on innovative revolution in mechanical structure.…”

Section: Introductionmentioning

confidence: 99%

Disc Varifocal Mechanism to Improve Efficiency of Scene Matching Navigation System

Leng

Meng

Wang

et al. 2009

2009 Second International Conference on Future Information Technology and Management Engineering

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In order to meet special requests of optical imaging sensor in scene matching navigation system, a disc varifocal mechanism is proposed for the flight vehicles of long flying time and range. Within small space occupied, it can obtain real images with various resolutions. Moreover, using plate traveling-wave Ultrasonic Motor as its driven motor can reduce energy loss, improve control precision and ensure image obtaining being real-time and stable. Disc varifocal mechanism driven by plate traveling-wave Ultrasonic Motor is high-response, and variation in load doesn't affect its performance parameter. Therefore, applying disc varifocal mechanism in scene matching navigation system, combing software and hardware, can obviously improve the accuracy, real-time and robust of scene matching navigation system. The experiment showed that when the weight of mechanism was 1.5kg, the shortest starting was 0.6ms, and the shortest shutoff was 0.5ms.

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