Streak tube
AssigneeHamamatsu Photonics K.K.
InventorKatsuyuki Kinoshita
Life of this patent
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Abstract
A streak tube the total length of which is short. An optical image of an object is converted into a plurality of divided micro incident electronic images by converting means and photoelectrons from these divided micro incident electronic images are focused by a focusing electron lens. Further, the photoelectrons are swept by a deflecting means and imaged on an output plane. Thus, the optical image of the object is converted into the divided micro incident electronic images, so that focusing and sweeping can be performed in short distance. Accordingly, the total length of the tube can be short.
Claims17
A streak tube comprising:
- converting means for converting an optical image into first and second divided micro-incident electronic spots, which are separated from one another by a predetermined space, said optical image being formed on said converting means by a light beam from a target object, and each electronic spot being treated as a point;
- a first focusing electron lens comprising a plurality of focusing electrode plates, each having an aperture, said focusing electrode plates being joined with one another in a state where said apertures of said focusing electrode plates are aligned, and said first focusing electron lens focuses electrons from said first divided micro-incident electronic spot by making the electrons pass through the apertures;
- a second focusing electron lens comprising a plurality of focusing electrode plates each having an aperture, said focusing electrode plates being joined with one another in a state where said apertures of said focusing electrode plates are aligned, and said second focusing electron lens focuses electrons from said second divided micro-incident electronic spot by making the electrons pass through the apertures;
- deflecting means comprising first and second deflecting electrodes, said first and second deflecting electrodes both have a comb-like shape, with teeth parts of said first deflecting electrode respectively facing teeth parts of said second deflecting electrode, with voltage between said first and second deflecting electrodes changing with the lapse of time, and said deflecting means deflecting a direction of movement of electrons from said first and second focusing electron lenses simultaneously by transmitting the electrons between the teeth of said first and second deflecting electrodes;
- and
- an output plane for imaging electrons passing through said deflecting means, image points on said output plane being formed by said electrons passing through said deflecting means, said electrons being swept by said deflecting means within an area that corresponds to said predetermined space.
Dependencies are inferred from the claim text.