Precision replication of microlens arrays using variotherm-assisted microinjection moulding
نویسندگان
چکیده
منابع مشابه
Microlens arrays
‡Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, NJ 07974, USA E-mail: [email protected] Microlenses are important optical components that image, detect, and couple light. But most synthetic microlenses have fixed position and shape once they are fabricated, so their possible range of tunability and complexity is rather limited. By comparison, biology provides many...
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Imaging or beam-steering systems employing a periodic array of microlenses or micromirrors suffer from diffraction problems resulting from the destructive interference of the beam segments produced by the array. Simple formulas are derived for beam steering with segmented apertures that do not suffer from diffraction problems because of the introduction of a moving linear phase shifter such as ...
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We discuss a modified femtosecond pulse shaper that uses microlens arrays to convert the continuous band of frequencies normally obtained in the mask plane of a pulse shaper into a series of discrete spots. Our experiments demonstrate that this modification can improve pulse-shaping quality when modulator arrays with large interpixel gaps are used for Fourier-plane filtering.
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Efficient homogeneous illumination of rectangular or circular areas with LEDs is a promising application for doublesided microlens arrays. Such illumination schemes employ a primary optics which can be realized with a concentrator or a collimation lens and a secondary optics with one or more double-sided microlens arrays and a collection optics for superposing the light from the individual arra...
متن کاملPose Hashing with Microlens Arrays
We design and demonstrate a passive physical object whose appearance changes to give a discrete encoding of its pose. This object is created with a microlens array that is placed on top of a black and white pattern. When viewed from a particular viewpoint, the lenses appear black or white depending on the part of the pattern that each microlens projects towards that viewpoint. We introduce the ...
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ژورنال
عنوان ژورنال: Precision Engineering
سال: 2021
ISSN: 0141-6359
DOI: 10.1016/j.precisioneng.2020.09.026