Video laser beam analyzer
AssigneeDuma Optronics, Ltd.
InventorOren Aharon
Life of this patent
Estimating the term…
Abstract
A light or laser beam analyzer, using an imaging formation device such as a CCD video camera is equipped with an attenuating controllable filter or electronic shutter. The incoming beam is imaged several consecutive images each with a different attenuation and the spatial power level distribution on the detector's surface is digitized and transmitted to a host computer for further processing. The host computer will present the power distribution and calculate the beam's profile and the beam's shape.
Claims8
An apparatus for measuring beam parameters of a light beam, comprising:
- a camera for creating an electronic image of the examined beam;
- attenuating means for creating different attenuating levels of the examined beam;
- a computer for capturing two or more differently attenuated images of the examined beam;
- software for processing and increasing the dynamic range of said apparatus;
- and
- a processor coupled to said camera for determining the beam parameters from the different captured images and revealing faint phenomena usually at the basis of the beam profile.
A method for measuring beam parameters of a light beam, comprising:
- providing a camera for creating at least one electronic image of the light beam to be examined;
- capturing at least two differently attenuated images of said light beam;
- and
- combining said at least two differently attenuated images to reveal faint phenomena not normally visible on the basis of only one image.
An apparatus for measuring intensity distribution of a beam across a plane transverse to the beam, comprising:
- at least one camera for creating an electronic image of the examined beam;
- attenuating means for creating different attenuating levels of the examined beam;
- a computer coupled to said at least one camera for capturing two or more differently attenuated images of the examined beam;
- software for processing and increasing the dynamic range of said apparatus;
- and
- a processor coupled to said camera for determining the beam intensity distribution from the different captured images and revealing faint phenomena usually at the basis of the beam profile, wherein
- the examined beam has a low intensity part and a high intensity part;
- the different attenuating levels include a low attenuation level and a high attenuation level;
- and
- said processor is operative for calculating the intensity of the low intensity part of the examined beam as a function of a relation between the low and high attenuation levels.
A method for measuring intensity distribution of a beam across a plane transverse to the beam, comprising:
- providing a camera for creating at least one electronic image of the light beam to be examined;
- capturing at least two differently attenuated images of said light beam;
- and
- combining said two or more differently attenuated images to reveal faint phenomena in the intensity distribution not normally visible on the basis of only one image, wherein
- the light beam to be examined has a low intensity part and a high intensity part;
- a first one of the captured images is a highly attenuated image of the light beam to be examined and a second one of the captured images is an image that is less attenuated than the highly attenuated image;
- and
- said combining step comprises calculating the intensity of the low intensity part of the light beam as a function of a relation between the attenuation of the first one of the captured images and the attenuation of the second one of the captured images.
Dependencies are inferred from the claim text.