Abstract: An optical element includes a substrate and an anti-reflective unit provided on one surface of the substrate. The anti-reflective unit includes a first coating layer, a second coating layer, a third coating layer, a fourth coating layer, and a fifth coating layer arranged on the substrate sequentially. The thickness of each of the first coating layer, the third coating layer, and the fifth coating layer is in the approximate range from 6 to 100 nanometers, and the thickness of each of the second coating layer and the fourth coating layer is in the approximate range from 10 to 200 nanometers. The first coating layer, the third coating layer, and the fifth coating layer are made of SiO2, and the second coating layer and the fourth coating layer are made of TiO2. The optical element can provide a high rate of light transmission.

Abstract: A grinding apparatus for grinding workpieces includes two clamping rods and a base. Each of the two clamping rods has a first end and an opposite second end. The first ends are opposite to each other for clamping workpieces therebetween. The base includes a receiving groove for receiving the workpieces therein and two positioning slots at opposite sides of the receiving groove. The positioning slots are aligned with each other and configured for receivingly engaging with the clamping rods to align the clamping rods with each other.

Abstract: A light guide plate, for use with a back-light module for seasonal scanning in dividing zones, includes a light-pervious substrate having a plurality of dividing blocks formed thereon, an optical grating structure disposed on light incident surface of each of the dividing blocks for allowing light to enter, and a light diffusion structure disposed on an optical surface of each of the dividing blocks for diffusing the light. As the light-pervious substrate is adapted for seasonal scanning in different zones, the provision of the optical grating structure can shorten the light mixing distance while the light diffusion structure can evenly emit and spread the light throughout the light guide plate to solve the drawbacks of the prior techniques. Further, a back-light module having the light guide plate is provided.

Abstract: A system and method for managing network devices via e-mail that accomplishes sending management commands to the management proxy device (140) and receiving status information on the managed device (150) via e-mail in a network management system. The system for managing network devices via e-mail comprised: at least one management base (100) that runs an e-mail client side program (113) as a network management tool to send e-mails containing management commands; at least one management proxy device that runs an e-mail service module (146) for receiving and analyzing e-mails containing management commands, and for sending e-mails containing status information on a managed device, said e-mail service module comprising an e-mail receiving sub-module (1461), a decryption sub-module (1462), a status information reporting sub-module (1463) and an e-mail sending sub-module (1464); and an e-mail server (160) that receives e-mails from the management base and the management proxy device.