Dear Colleagues,
A photopolymer or light-activated resin is a polymer that changes its properties when exposed to light, often in the ultraviolet region. Among these photopolymers, transparent photopolymers are often used to compose optical elements. However, two properties restrict their much wider use.
The first issue is that when applied to form a microstructure, their refractive index and dispersion property are often different from those of bulk-structures. Precisely measuring their optical properties could be an important issue, one solution of which could be to measure its refractive index and dispersion by forming a micro-optical element, which has a comparable microdimension.
The second issue is that when applied in a highly chemical environment, such as a contact lens on the cornea, the refractive index and geometry of photopolymers changes. Under this condition, it is important to precisely describe the mechanism of variation or measure the changes in the refractive index, size, and profile of the formed optical elements. In the industry, trial and error has been a solution adopted in the production line.
The third issue is the bioeffect of polymers in various cells, tissues, and organisms. There are several polymers that are used a lot in organisms, including filling dental cavities, bone cement, contact lenses. Therefore, the bioeffect of polymers is a critical question for human health.
This Special Issue seeks high-quality works and topics focusing, among others, on the latest approaches to the measurement of optical properties and geometry of polymer-based lenses for different applications.
Prof. Shuan-Yu Huang
Guest Editor