Abstract: Microlens array formation and alignment to heterogeneously integrated optoelectronic devices. Optoelectronic devices are printed or transferred in a single process step while also creating inactive optoelectronic devices that are precisely shaped for alignment purposes rather than for optical or electrical performance. Microlenses are integrated monolithically. The microlenses are aligned directly to a fiducial generated by the device integration step, reducing overall misalignment. Additionally, we use specific optical designs for the lenses to add novel functionalities to the system. By designing the lenses with engineered offsets, distances and curvatures with respect to the arrays of optoelectronic devices, we control properties of light such as: angles, phase, beam widths, and wavelength dependence.

Abstract: A compact bi-telecentric device includes refractive lenses and takes in light from a grid of emitters at the object plane and images them to a grid of receivers. It provides the capacity to combine multiple wavelengths of emitters at the object plane into a single receiver. The device is quite compact, less than 25 mm in length from object to image, and having a maximum diameter for any element of less than 4 mm. The device includes four optical lens elements, three of which have a positive focal length and one of which has a negative focal length. The device includes at least one diffractive optical element. The lens elements are separated into two distinct groups which each have positive optical power, separated by an aperture stop which may or may not be enabled by a physical surface. A diffractive element enables wavelength division multiplexing and compensates for distortion from the bi-telecentric device.