4results about "Image pickup tubes" patented technology

In a photoelectric conversion device, the meta-surface includes a first antenna portion, a first bias portion, a second antenna portion, and a second bias portion. The first antenna portion extends in a first direction and emits an electron in response to incidence of the electromagnetic wave. The first bias portion faces the first antenna portion and is configured to generate an electric field having a component in the first direction between the first bias portion and the first antenna portion. The second antenna portion extends in a second direction intersecting the first direction and emits an electron in response to incidence of the electromagnetic wave. The second bias portion faces the second antenna portion and is configured to generate an electric field having a component in the second direction between the second bias portion and the second antenna portion.

The photoelectric conversion device includes an electron emitting member. The electron emitting member has a metasurface that emits electrons in response to the incidence of electromagnetic waves. The metasurface includes a first antenna portion, a first bias portion, a second antenna portion, and a second bias portion. The first antenna portion extends in a first direction and emits electrons in response to the incidence of electromagnetic waves. The first bias portion faces the first antenna portion and is configured to generate an electric field having a component in the first direction between the first antenna portion and the first antenna portion. The second antenna portion extends in a second direction intersecting the first direction and emits electrons in response to the incidence of electromagnetic waves. The second bias portion faces the second antenna portion and is configured to generate an electric field having a component in the second direction between the second antenna portion and the second antenna portion.

To provide a photodetector capable of reducing the crosstalk between channels.SOLUTION: A photodetector 1 comprises: a tabular incident surface plate 2 on which a photoelectric surface 2s for emitting photoelectrons in accordance with incident light is formed; and a semiconductor element 10 for detecting the photoelectrons emitted from the photoelectric surface 2s, the semiconductor element being disposed to face the photoelectric surface 2s. The semiconductor element 10 has a first portion 11 having an electron incident surface 11s facing the photoelectric surface 2s, the electron incident surface including a plurality of channels ch that are arranged separated from each other. A distance b between the photoelectric surface 2s and the electron incident surface 11s, an interval Δch between the channels ch, and a voltage V applied between the photoelectric surface 2s and the electron incident surface 11s satisfy the formula (1): distance b [mm] / interval Δch [mm]<14.4×voltage V [kV]+60.SELECTED DRAWING: Figure 3