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ball lens
Micro-ball lens array fabrication in photoresist using PTFE hydrophobic effect
      
This paper presents a simple method for fabricating a micro-ball lens and its array.
      
High contact angle between the melted photoresist pattern and PTFE generates the micro-ball lens and array.
      
A thermal reflow process is then applied to melt these micro-column patterns into a micro-ball lens array.
      
The achieved micro-ball lens array has a diameter of 98?μm fabricated using 80?μm diameter patterns.
      
Batch Assembly Micro-Ball Lens Array for Si-Based Optical Coupling Platform in Free Space
      
The paper presents novel concepts of batch fabrication of micro-ball lens array technology integrated on the silicon-based wafer which can improve the appropriate distance for optical fiber coupling.
      
The silicon-based optical coupling platform consists of a self-parking framework (including flat-topped mesa and intersection of two v-grooves) and micro-ball lens array for optical fiber coupling purposes.
      
The structure of optical coupling platform is able to improve the distance between fiber and micro-ball lens and to increase coupling efficiency.
      
The micro-ball lens array is batch fabricated by polymeric material and thick photoresist, and then bonded onto a flat-topped mesa that adjoins to the v-groove.
      
This fabrication process not only provides accurate coupling distance between fibers and micro-ball lens, but also reduces micro-assembly cost.
      
It consists of a half-ball lens, a ZnS/YF3 multilayer optical interference filter with a pinhole, and an annular a-Si:H PIN photodiode allowing the laser excitation to pass up through the central aperture in the photodiode and the filter.
      
Ball lens coupled fiber-optic probe for depth resolved spectroscopy of epithelial tissue Richard A.
      
Fiber optic cable, ball lens, and rotating micromirror are shown here.
      
Photograph of the ball lens coupled probe illuminating a cuvette containing the fluorescent dye Rhodamine.
      
This contribution from the lower layer is significantly reduced by the use of the ball lens coupled probe.
      
The chip combines a laser diode and ball lens with a micromachined two-degree of-freedom beam-steering mirror.
      
The microscope's chip com bines a laser diode and ball lens with a micromachined two degree-of-freedom beamsteering mirror.
      
 

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