Shusaku Nagahara

2/3-Inch Format MOS Single-Chip Color Imager

A new 2/3-in format MOS single-chip color imager, that includes 384 X 485 elements, has been developed. The device features a low-noise design; high sensitivity (9 nApp/lx for 2855 K W lamp), through employment of a complementary color filter; and wide dynamic range (over 60 dB), through introduction of a p/sup +/-layer in the photodiode and a vertical buffer circuit. The imager also features low aliasing (Moire) and clear color due to the use of a new color filter arrangement and unique multivideo lines. The die measures 10.0 mm X 8.5 mm, which is realized using standard 3-/spl mu/m Si-gate MOSLSI technology. Combining this small size and technological simplicity with on-wafer color filter processing, has made this device suitable for LSI volume production.

MOS Area Sensor: Part I - Design Consideration and Performance of an n-p-n Structure 484 x 384 Element Color MOS Imager

The design consideration and performance of an n-p-n structure 484 X 384 element MOS imager is described. The imager has a photodiode array and scanners separately integrated on different p wells. The horizontal scanner, consisting of bootstrapping type non-inverting circuits, features high speed and low noise. The maximum scan rate of the scanner is ~15 MHz. The vertical scanner, consisting of inverting circuits, has a wide dynamic operating range. It can operate stably under an intense illumination of ~1500 lx. Analysis of the MOS switch with a photodiode is also carried out. The 484 X 384 imager has shown excellent performances: signal to fixed-pattern-noise ratio of 54 dB, horizontal resolution of 260 TV lines, vertical resolution of 350 TV lines, well-balanced spectral response, and antiblooming.

A Method of Automatic Scanning Beam Control of Television Camera Tube

撮像管の走査ビーム量を被写体の明るさに応じて制御する方法は, 撮像管の光量範囲を広げるうえで効果がある.その方法のひとつに, 信号成分を撮像管のビーム制御電極に帰還させる方式があるが, これには原因不明の発振現象が付随していた.本論文はその発振原因を究明するとともに, 回路が正常に動作するための安定条件を示す.さらに撮像管のターゲット面からの戻りビーム成分を帰還させる新しいビーム量制御方式についても述べる.

A Color Camera with a Tri-Electrode Vidion

各原色ごとに分割された信号電極を有する3電極管およびこれを用いたカラーカメラを開発した.3電極方式には信号電極間の静電容量により色信号のクロストークの発生, 雑音の増加などの特異な現象があるが, これらの性質の解析, 視覚実験による許容限の設定を行い, 各部の最適定数を決定した.さらに3電極方式は色の一様性, ダイナミックレンジ, 安定性などにすぐれていることを試作カメラで確認した.

Tri-Electrode Vidicon for Use in a Single Tube Color TV Camera

3電極方式単管カラーカメラ用ビジコンを, 主として微細加工技術を検討することにより開発した.このビジコンは, ストライプ状色フィルターとそれに重ね合わさり2層配線法により相互接続されたストライプ状信号電極から成り立っている.3色の信号電流を独立した電極から取り出すことができるため, カメラは小型化でき, 色再現性, 一様性, 光量範囲を3管式相当にすることができる.

A novel tri-color pick-up tube for use in a single tube color TV camera

A novel tri-color pick-up tube which has the ability to simultaneously generate three independent video signals with a single tube has been successfully developed for use in a single tube color TV camera. The target consists of three sets of 216 color-sensitive striped electrodes corresponding to the red, green and blue striped filters. The striped electrodes of SnO 2 are precisely delineated by sputter-etching through a chromium mask and connected by the multilayered interconnection method. Cameras utilizing this new pick-up tube exhibited excellent performance owing to the target structure. That is, the hue of reproduced picture was natural and faithful to that of the original scene and the camera was easy to handle and stable in operation. The size was 125mm × 105mm × 310mm and the weight was 3.9kg.

Analysis on Signal of Frequency Division Multiplex Color Camera Using Single Pickup Tube and Single Carrier

1搬送波周波数分割多重カラーカメラにおいて, 搬送波を変調している2種の色信号成分を分離するのに必要な各部の定数の一般的な関係式を求めた.これを用い, 1搬送波方式の輝度ビートは2搬送波方式と異なり走査線と平行な構造となること, また1搬送波方式個有の問題として, 走査線1本おきの構造の色ビートが発生しやすいことを示した.