Remote reading infrared thermometer
AssigneeMikron Instrument Company, Inc.
InventorDonald S. Michael
Life of this patent
Estimating the term…
Abstract
A radiation detector senses ambient radiation within the cavity of an instrument, and then radiation from a target object, the sensed radiation from within the cavity following substantially the same optical path within the instrument as the radiation from the target object, thus minimizing error due to internal cavity temperature and other disturbances during measurement of radiation from the target object.
Claims9
In a remote reading infrared theremometer having a housing defining a cavity, an aperture in said cavity for admitting to said cavity radiation emanating from a target object, radiation detector means disposed in said cavity, and radiation directing means disposed in said cavity for selectively directing toward said detector means ambient radiation from within said cavity and then radiation emanating from a target object of unknown temperature outside said cavity, and manually operable means coupled to said radiation directing means for moving said radiation directing means from a first position wherein said radiation directing means directs toward said detector means ambient radiation from within said cavity and a second position wherein said radiation directing means directs toward said detector means radiation emanating from said target object, said radiation directing means being a mirror of concave cross-section, and having its optical axis aligned with said aperture when in said second position.
In a remote reading infrared thermometer having a housing defining a cavity, an aperture in said cavity for admitting to said cavity radiation emanating from a target object, radiation detector means disposed in said cavity, and radiation directing means disposed in said cavity for selectively directing toward said detector means ambient radiation from within said cavity and then radiation emanating from a target object of unknown temperature outside said cavity, said radiation directing means being a mirror pivotably mounted within said cavity and juxtaposed to said detector means, said mirror being pivotable between a first position wherein said mirror directs toward said detector means ambient radiation from within said cavity and a second position wherein said mirror directs toward said detector means radiation emanating from said target object, and ambient temperature sensing means disposed in said cavity, said mirror being directed toward said ambient temperature sensing means when said mirror is in said first position.
Dependencies are inferred from the claim text.