Abstract: A light sensing module includes a substrate, a light sensing unit, a first light-transmissive component, and a light shielding layer. The light sensing unit is disposed on the substrate to sense an intensity of a working light beam, and has an upper light receiving surface and a lateral surface perpendicular to the upper light receiving surface. The first light-transmissive component covers the light sensing unit, and has a first refractive index between a refractive index of the light sensing unit and a refractive index of air. The light shielding layer surrounds the lateral surface and is covered by the first light-transmissive component.

Abstract: A method of making a hollow ornamental knotted article includes: forming a thread into a loose knotting which confines a hollow space; wrapping a solvent-soluble filler with a protective material, and inserting the wrapped filler into the hollow space; tightening the thread so as to tie tightly the wrapped filler and adjust the loose knotting into a tight knotting; applying a shape-setting liquid to the tight knotting so as to set the profile of the tight knotting; and injecting a solvent into the filler through the protective material to dissolve the filler, and drawing out the dissolved filler and the protective material from the hollow space, thus forming a hollow ornamental knotting.