Abstract:
Provided are a lighting apparatus, and an optical inspection apparatus and an optical microscope using the lighting apparatus. The lighting apparatus includes a light source that emits light, an optical device that outputs light that is more uniformly intense over a predetermined ray angle distribution than light input thereto; a multi-reflection device that reflects light multiple times, the multi-reflection device having a light incident surface receiving light and a light emission surface that emits multiply reflected light, and a light diffusion device that diffuses the light emitted from the light emission surface of the multi-reflection device. The light source, the optical device, the multi-reflection device, and light diffusion device share an optical path.
Abstract:
An electron beam apparatus includes at least one electron beam column. The at least one beam column includes an electron beam optical system to irradiate an electron beam on a surface of a sample, and a detection system to detect electrons generated from the electron beam. The electron beam optical system includes an object lens to focus the electron beam on a surface of the sample. The object lens includes an electrostatic lens having a first electrode to which a first voltage is applied, a second electrode that is grounded, a third electrode to which a second voltage is applied, and a fourth electrode that is grounded. The first through fourth electrodes sequentially arranged relative to the sample.