&lt;title&gt;Polymeric waveguide design of a 2D scanner&lt;/title&gt;

Panergo, Reynold R.; Liu, Chao Shih; Estroff, Benjamin; Wang, Wei Chih

doi:10.1117/12.607003

Cited by 5 publications

(3 citation statements)

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“…Commercially available endoscopes suffer from a fundamental tradeoff between high image quality and small size [1,5,6]. Since endoscopes often use a bundle of optical fibers to register the image on the pixels in a camera, thus, the diameter of currently available flexible endoscopes cannot be reduced to smaller than the image size.…”

Section: Introductionmentioning

confidence: 99%

Large beam deflection using cascaded prism array

Wang

Tsui

2012

SPIE Proceedings

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Endoscopes have been utilize in the medical field to observe the internals of the human body to assist the diagnosis of diseases, such as breathing disorders, internal bleeding, stomach ulcers, and urinary tract infections. Endoscopy is also utilized in the procedure of biopsy for the diagnosis of cancer. Conventional endoscopes suffer from the compromise between overall size and image quality due to the required size of the sensor for acceptable image quality. To overcome the size constraint while maintaining the capture image quality, we propose an electro-optic beam steering device based on thermal-plastic polymer, which has a small foot-print (~5mmx5mm), and can be easily fabricated using conventional hot-embossing and micro-fabrication techniques. The proposed device can be implemented as an imaging device inside endoscopes to allow reduction in the overall system size. In our previous work, a single prism design has been used to amplify the deflection generated by the index change of the thermal-plastic polymer when a voltage is applied; it yields a result of 5.6° deflection. To further amplify the deflection, a new design utilizing a cascading three-prism array has been implemented and a deflection angle to 29.2° is observed. The new design amplifies the beam deflection, while keeping the advantage of simple fabrication made possible by thermal-plastic polymer. Also, a photo-resist based collimator lens array has been added to reduce and provide collimation of the beam for high quality imaging purposes. The collimator is able to collimate the exiting beam at 4 µm diameter for up to 25mm, which potentially allows high resolution image capturing.

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Section: Introductionmentioning

confidence: 99%

Large beam deflection using cascaded prism array

Wang

Tsui

2012

SPIE Proceedings

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“…We have developed a 2D micro-image display device using MEMS technology that may overcome these size-reduction limits while matching the resolution and FOV of mirror-based displays. This optical scanner includes a microfabricated, polymer-based cantilever waveguide that is electromechanically deflected by a 2D piezoelectric actuator 6,7 (see Figure 1). The direction in which the light beam is emitted from the tip of the cantilever waveguide is controlled by displacing it in two orthogonal directions.…”

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confidence: 99%

“…The resist was chosen for its ability to produce good vertical-side-wall profiles and to control dimensions over the entire structural height. 7 We started with a silicon wafer with one polished side, on which we deposited a thin layer of silicon dioxide to buffer the coupling of the light beam into the waveguide. The cantilever waveguide was then patterned on this oxide layer.…”

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confidence: 99%