摘要:
The present invention relates to a photodetector that has a structure capable of realizing a wide range gain adjustment for each of electron multiplier channels respectively assigned to a plurality of light incidence regions of a multi-anode multiplier. The photodetector comprises a multi-anode photomultiplier, and a bleeder circuit unit. The multi-anode multiplier has a dynode unit constituted by N (an integer or no less than 3) dynode plates, and n-th (an integer of no less then 2) dynode plate is constituted by a plurality of control plates respectively corresponding to the multiplier channels. The bleeder circuit unit has a primary section setting each potential of a first to (n−1)-th and (n+1)-th to N-th dynode plates, and a secondary section for individually setting a potential of each control plate at any potential within the range wider than a potential difference between the (n−1)-th and (n+1) dynode plates. By expanding the potential setting range for the control plates rather than the potential difference between the dynode plates adjacent to the n-th dynode plate, the gain of each electron multiplier channel can be controlled by two digits or more.
摘要:
An electrochromic element including a pair of electrochromic bases is provided. Each electrochromic base is defined by a substrate, an electrode layer disposed on the substrate, and a color-forming layer disposed on the electrode layer. The electrochromic bases are superposed such that their respective color-forming layers face each other. A solid electrolyte of ultraviolet-setting type is disposed between the color-forming layers of the electrochromic bases. The method of manufacturing the electrochromic element and the method of driving the same are also disclosed.
摘要:
A robot comprises a fixed member that has a lower end, a movable member, and an elastic sheet member. The movable member is supported by the fixed member to be movable between an uppermost position and a lowermost position of a movable range given to the movable member in a vertical direction relative to the fixed member. This movable member has a lower end at which an operation tool is provided The elastic sheet member has both ends. Of these ends, one end is fixed to the lower end of the fixed member and the other end is fixed to the lower end of the movable member. This sheet member droops when the movable member moves up to the uppermost position of the fixed member.
摘要:
A spectroscopic device that can suppress the occurrence of cross-talk when light beams of different wavelength ranges are optically received is provided. Detected light is made incident to a dichroic minor (hereinafter referred to as “mirror”) DM1 along the perpendicular direction of a photoelectric surface 7. Accordingly, light transmitted through the mirror DM1 is made incident substantially perpendicular to the photoelectric surface 7. On the other hand, light reflected from the mirror DM1 is reflected from a main mirror surface 23. At this time, the dichroic mirror array 21 is inclined so that the mirror DM8 side having the minimum shortest wavelength is nearer to the photoelectric surface 7 than the minor DM1 side having the maximum shortest wavelength and substantially parallel to the main minor surface 23a, so that light reflected from the main mirror surface 23a is made incident to the mirror DM2 along the perpendicular direction of the photoelectric surface 7. Accordingly, light transmitted through the mirror DM2 is made incident substantially perpendicular tote photoelectric surface 7. As described above, the light transmitted through each mirror DMn is substantially vertical made incident to the photoelectric surface 7, and thus the occurrence of cross-talk can be suppressed.
摘要:
A photomultiplier eliminates the reflection of light off of focusing pieces in a focusing electrode and prevents the photocathode from emitting useless electrons in response to such reflected light by including an oxide film formed over the surface of each focusing piece. The oxide film is also formed on the surface of secondary electron emission pieces in the first and second stage dynodes to eliminate the reflection of light off of the secondary electron emission pieces and to prevent the photocathode from emitting useless electrons in response to such reflected light. Further, a light-absorbing glass partitioning part is provided in a light-receiving faceplate to suppress crosstalk between channels.
摘要:
A photomultiplier includes a cathode supporting member, arranged in a tube and comprised of a conductive material, for holding a photocathode, and a holding mechanism, comprised of a heat conductive material, for biasing the cathode holding member to hold it. The holding mechanism is thermally connected to a cooler.
摘要:
A photomultiplier includes a cathode supporting member, arranged in a tube and comprised of a conductive material, for holding a photocathode, and a holding mechanism, comprised of a heat conductive material, for biasing the cathode holding member to hold it. The holding mechanism is thermally connected to a cooler.
摘要:
A substrate for producing a gallium nitride compound-semiconductor (Al.su Ga.sub.1-x N; X=0 inclusive) device in vapor phase on a sapphire substrate using gaseous organometallic compound, and a also blue light emitting diode produced by using the substrate. The buffer layer comprising aluminium nitride (AlN) and having a crystal structure where microcrystal or polycrystal is mixed in amorphous state, is formed on the sapphire substrate. The buffer layer is formed at a growth temperature of 380.degree. to 800.degree. C. to have a thickness of 100 to 500 .ANG.. Further, on the buffer layer is formed the layer of gallium nitride compound-semiconductor (Al.sub.x Ga.sub.1-x N; X=0 inclusive). The layer of gallium nitride compound-semiconductor (Al.sub.x Ga.sub.1-x N; X=0 inclusive) comprising at least two layers having different conductive types and being sequentially layered on the buffer layer, functions as a light emitting layer. The existence of the buffer layer having the aforementioned structure greatly contributes on the improved high-quality single crystal of the gallium nitride compound-semiconductor. On the other hand, the blue light emitting property is also improved due to the increase of the quality.
摘要翻译:用于使用气态有机金属化合物在蓝宝石衬底上制造氮化镓化合物半导体(Al x Ga 1-x N; X = 0)的基板,以及通过使用该衬底制造的蓝色发光二极管。 在蓝宝石衬底上形成包含氮化铝(AlN)并且具有以非晶态混合微晶或多晶体的晶体结构的缓冲层。 缓冲层在380〜800℃的生长温度下形成,厚度为100〜500。 此外,在缓冲层上形成氮化镓化合物半导体层(Al x Ga 1-x N; X = 0)。 包含至少两层具有不同导电类型并依次层叠在缓冲层上的氮化镓化合物半导体层(Al x Ga 1-x N; X = 0)包括层,用作发光层。 具有上述结构的缓冲层的存在大大有助于改进的氮化镓化合物半导体的高质量单晶。 另一方面,由于质量的提高,蓝色发光特性也得到改善。
摘要:
A method of producing a light-emitting semiconductor device of a group III nitride compound includes forming an N-layer of an N-type conduction, the N-layer comprising gallium nitride, forming a high carrier concentration N+-layer satisfying the formula (Alx3Ga1-x3)y3In1-y3N, wherein 0≦x3≦1, 0≦y3≦1 and 0≦x3+y3≦1, on the N-layer, forming an emission layer of a group III nitride compound semiconductor satisfying the formula, Alx1Gay1In1-x1-y1N, where 0≦x1≦1, 0≦y1≦1 and 0≦x1+y1≦1 on the high carrier concentration layer N+layer, doping Si and Zn into the emission layer, forming a P-layer of a P-type conduction, on the emission layer, the P-layer including aluminum gallium nitride satisfying the formula Alx2Ga1-x2N, wherein 0≦x2≦1, and forming a contact layer of a P-type conduction, on the P-type layer, the contact layer including gallium nitride.
摘要翻译:制造III族氮化物化合物的发光半导体器件的方法包括形成N型导电的N层,N层包括氮化镓,形成满足式(Al x Ga 1 -x3)y3In1-y3N,其中在N层上形成满足公式的III族氮化物化合物半导体的发射层Al x1Gay1In1,其中0和nlE; x3和nlE; 1,0和n1E; y3和nlE; 1和0< n1E; x3 + y3& -x1-y1N,其中0≦̸ x1≦̸ 1,0和nlE; y1≦̸ 1和0≦̸ x1 + y1≦̸ 1在高载流子浓度层N +层上,将Si和Zn掺杂到发射层中,形成P层 在发射层上的P型导电,包含满足式Al x Ga 1-x 2 N的氮化铝镓的P层,其中0< n1E; x2≦̸ 1,并且在P型上形成P型导电的接触层 层,接触层包括氮化镓。