Session Index

The femtosecond laser gained a reputation as a reliable and extremely precise tool for micro- and nanofabrication. Here we present our recent work in applying and finetuning fabrication techniques in several aspects, namely the significant enhancement of 3D resolution, dynamic throughput manipulation via shaping the laser beam and spatial light modulation, as well as combining laser processing with other established manufacturing techniques. Finally, additive 3D nano-manufacturing of non-organic structures is discussed, explaining the undergoing physical phenomena, and showing examples of produced 3D objects. In conclusion, we demonstrate yet another example of laser 3D processing being a powerful tool for advanced fabrication with far-reaching implications in various fields.

 

The optimum combination of three glass materials is obtained for correction of chromatic aberration using the three- prism combination Illustrating method and optimization program.

 

A white LED with a luminous flux of 146lm is used in this low beam vehicle light design. The design includes two prism arrays, a compound reflector, and a toroidal lens which was modified to correct the light pattern. The total received lumens was 123.9lm and the efficiency was 85.86％.

 

We discuss the relative illumination for a large-aperture projector lens design. The EFL and f-number are 24.06mm and 1.741, respectively. The screen size is 206inches and the max-aperture is 74.86mm. We also derive the relative illumination equations for interface transmission, internal transmission and solid angle. The relative illumination is 98.7%.

 

The periscope zoom lens depth depends either on the prism thickness or the maximum aperture of the zoom lens in the Y-direction. To reduce the periscope zoom lens depth to 5mm for an 8-Megapixel device, we use a 16:9 aspect ratio sensor with a rectangular aperture.

 

This study is to simulate the retinal peripheral refraction of emmetropic and myopic eyes when wearing correction spectacles at distance and near views. The results show that the myopic spectacle could enhance the retinal relative peripheral hyperopic refractions.

 

An innovative dual-frequency double-diffraction type laser interferometer based on coplanar detection design is proposed. The proposed method takes “grating” as the core of technology development. By integrating the advantages of heterodyne dual-frequency interferometry and coplanar detection double-diffraction optical design, the system has high resolution, high repeatability and multi-degree-of-freedom measurement capabilities.

 

The study explored and implemented image reconstruction of three-dimensional diffuse optical tomography using synchronous multi-frequency driving light source. To the purpose square waves were employed so that multiple sets of light intensity and phase lag information can be obtained in a single measurement.

 

A portable laser pest control system employing deep learning for Caterpillar head identification using YOLO was developed. On detecting the head, laser beams were utilized to render the caterpillars powerless. On-field testing was performed for the system and the results were noted.