A blood condition indicating and detecting device for use with the palpebral conjunctiva, especially for physiological measurement, includes a locating body having a primary layer with a concave face adapted to abut the sclera and having a convex face adapted to abut the palpebral conjunctiva. The locating body is arranged to be away from the cornea and supports an electrical detecting device having a surface abutting the palpebral conjunctiva. Electrical leads extend from the detecting device t...

The invention is a device for measuring the contour of a surface. Light from a source is imaged by a lens onto the surface which concentrates the energy from the source into a spot. A scanning means is used to scan the spot across the surface. As the surface is being scanned the surface moves relative to the point of perfect focus. When the surface moves away from perfect focus the spot increases in size, while the total energy in the spot remains virtually constant. The lens then reimages the l...

A laser-based inspection tool (LIT) for disks that allows simultaneous inspection of disk surfaces for defects and curvature. The laser beam is directed by a rotating scanner, such as a rotating polygon mirror, to the input of a telecentric lens assembly that provides an output beam parallel to its optical axis as the beam is being scanned. The output beam from the telecentric lens strikes the disk surface substantially perpendicularly. The beam is then reflected from the disk surface and passes...

A laser beam system for measuring an aspect of a surface wherein a laser beam is reshaped into a corrected shaped laser beam having a corrected energy profile and subsequently reshaped into a measurement shaped laser beam having an measurement energy profile shaped to be effected by the at least one aspect of the surface. The measurement shaped laser beam is reflected from the surface, being modified by the aspect of interest of the surface, and to a sensor array wherein the sensors measure the ...

In order to provide light guides, in particular in the form of glass rod portions, with improved end faces, the invention provides a method for examining glass rods, in particular light guides, in which the glass rods are arranged in front of two cameras, the cameras recording the end faces from the sides, in two different radial viewing directions with respect to the longitudinal axis of the glass rods, and the planarity and angularity of the contour of the end faces being optically and contact...

A method for measuring the parameter of a rough film is presented in this invention. In which the optical property of a rough film is further defined by utilizing the characteristics of an optical instrument and silicon film, without disturbance from noise in measurement. Therefore, good or bad the rough film is can be detected effectively, further, a handy method can be offered to control the stability in the manufacturing process. The invention is performed by choosing a measuring light with w...

A method and apparatus for measuring surface roughness, waviness, cracks or any irregularities or flatnesses in a surface utilizing statistical properties of dichromatic speckle patterns. In practice surface roughness is normally measured utilizing standard profile measuring devices. However, these instruments are not efficient in practice in view of their slowness for effecting measurements. The present invention provides an improved method of measuring surface roughness including the following...

A system for measuring an amount of microroughness of a surface of a substrate, wherein a first beam of electromagnetic radiation and a second beam of electromagnetic radiation are generated, the first and second beams being substantially parallel and spaced apart from each other so that the first and second beams are substantially non-overlapping, and the first and second beams are focused onto the substrate so that the beams impinge upon a selected area of the surface of the substrate having a...

A projection measuring instrument requiring no exchange work of overlay chart for comparatively observing a workpiece image and a template is provided. For the object, a table (56) for a workpiece (55) to be put on, an observation optical system having a screen (1) and a projection lens (53) for projecting an image of the workpiece (55) onto the screen (1), a relative movement unit (57) for relatively moving the table (56) and the observation optical system, and a displacement sensor (61) for de...

A method for obtaining texture measurements of a highly-polished surface (110) uses a directed-energy light source (124) to perform the steps of scattering the directed-energy light from a plurality of known texture surfaces. The known texture surfaces have equivalent surface area and dimensions to those of the highly-polished surface (110). A next step is to measure (102 and 130) the scattered light from the directed-energy light source (124) to establish a threshold energy level measurement (4...