摘要:
A lens element 1 is formed by making use of an optical substrate, and includes a lens portion 2, an edge portion 6 in the form of a circular arc provided along the circumference of the lens portion 2, and a handling portion 4 which is integrated with the lens portion 2 and the edge portion 6 as well and extends with a width wider than that of the lens portion 2. The handling portion 4 can be caught and held by using a grasping means, a vacuum sucking means and so forth. With this, the lens element 1 can be handled by catching the handling portion 4 without directly touching the lens element 1, thus the lens element 1 being neither damaged nor contaminated, and being stably handled with ease.
摘要:
A photosensitive device with a microlens array may be packaged for surface mount packaging and subsequent mass reflow processing without significantly degrading the optical performance of the microlens. The microlens may be formed using a series of heat steps of increasing time and temperature. In addition, the microlens may be bleached to prevent degradation of its optical transmissivity at temperatures normally associated with surface mount techniques.
摘要:
A lens element 1 is formed by making use of an optical substrate, and includes a lens portion 2, an edge portion 6 in the form of a circular arc provided along the circumference of the lens portion 2, and a handling portion 4 which is integrated with the lens portion 2 and the edge portion 6 as well and extends with a width wider than that of the lens portion 2. The handling portion 4 can be caught and held by using a grasping means, a vacuum sucking means and so forth. With this, the lens element 1 can be handled by catching the handling portion 4 without directly touching the lens element 1, thus the lens element 1 being neither damaged nor contaminated, and being stably handled with ease.
摘要:
In a method for bonding a silicon substrate to a III-V material substrate, a silicon substrate is contacted together with a III-V material substrate and the contacted substrates are annealed at a first temperature that is above ambient temperature, e.g., at a temperature of between about 150° C. and about 350° C. The silicon substrate is then thinned. This bonding process enables the fabrication of thick, strain-sensitive and defect-sensitive optoelectronic devices on the optimum substrate for such, namely, a thick III-V material substrate, while enabling the fabrication of silicon electronic devices in a thin silicon layer, resulting from the thinned Si substrate, that is sufficient for such fabrication but which has been thinned to eliminate thermally-induced stress in both the Si and III-V materials. The III-V material substrate thickness thereby provides the physical strength of the composite substrate structure, while the thinned silicon substrate minimizes stress in the composite structure.
摘要:
A diffractive optical element (DOE) is shown formed on a substrate. The DOE is characterized, in one embodiment, by being formed from a plurality of members that are each individually created on a top surface of the substrate. The members may be formed by depositing a poly-silicon material on the substrate or by growing a silicon crystal on the substrate and performing an etch step. The substrate may be formed of a sapphire crystal. The DOE may be used to reflect incident light traveling within the substrate under total internal reflection. The widths, spacing between, and heights of the strips forming the DOE may be designed so as to reflect the incident light within the substrate in a direction of propagation acute to that of the incident light.
摘要:
A photosensitive device with a microlens array may be packaged for surface mount packaging and subsequent mass reflow processing without significantly degrading the optical performance of the microlens. The microlens may be formed using a series of heat steps of increasing time and temperature. In addition, the microlens may be bleached to prevent degradation of its optical transmissivity at temperatures normally associated with surface mount techniques.
摘要:
An optical device includes a light transmitting non-linear optical material having a first face and a second face. The first and second faces oppose each other. The first face has a plurality of first reflecting portions provided thereon, and the second face has a plurality of second reflecting portions provided thereon. Each of the second reflecting portions corresponds to one of the first reflecting portions. Furthermore, the first and second faces are substantially flat except for at least one convex arcuate portion being formed on at least one of the first and second faces. Additionally, at least one of the first and second reflecting portions is obtained by coating a reflective material on the convex arcuate portion.
摘要:
In one embodiment, the present invention provides a microlens having very small focal length. The present invention also provides a non-planar microstructure having a covering layer which is slowly oxidizing or substantially free of oxygen. The present invention also provides methods for forming such microlenses and microstructures. In addition, the present invention provides a VCSEL which includes one or more non-planar microstructures of the present invention.
摘要:
For forming bores for insertion of optical fibers, etc., on one side surface of a micro lens with high accuracy and easy work, a laser processing method that includes the steps of: irradiating a laser beam onto the one side surface of the micro lens; then focusing the laser beam in a layer having superiority in absorbency with respect to the laser beam; and forming the bores because the laser beam exceeds the threshold value of causing fusion, evaporation or ablation in the superior laser beam absorption layer.
摘要:
A method for forming lensed ends on waveguides to within very fine tolerances is applicable to many types of waveguides, including single fibers and POWs. The method uses photolithographic materials and techniques, but uses the waveguides themselves to provide the exposing radiation. Thus a method for forming a lens on the end of a waveguide having a waveguiding region and a cladding region includes the step of coating a first end of the waveguide with a photoresist material having sensitivity to at least light in a particular wavelength range. Light in that particular wavelength range is then injected into a second end of the waveguide so that the light within the waveguiding region preferentially exposes the photoresist that covers the waveguiding region at the first end of the waveguide. The method can be carried out with either positive photoresist (where only the exposed portion is removed by development) or negative photoresist (where only the exposed portion remains after development).