JPS62120717U

JPS62120717U -

Info

Publication number: JPS62120717U
Application number: JP18775886U
Authority: JP
Priority date: 1986-12-04
Filing date: 1986-12-04
Publication date: 1987-07-31

Description

[Brief explanation of the drawing]

第１図はデイフオーカス量と像の高周波成分の
量との関係を示すグラフであり、デイフオーカス
量Ｏ（合焦を示す直線）より離れるに従つてデイ
フオーカス量が増し高周波成分が減少する事を示
す。第２図は受光素子列の図で、この例では５個
の受光素子が直線上に並んでいる。第３図はフイ
ルム面をはさんで２列のセンサーが並んでいる状
態を示す。第４図は本考案装置を入れた一眼レフ
カメラの実施例を示す構成図である。第５図は第
４図の構成により得られるコントラスト出力の焦
点整合位置とデイフオーカス状態での変化を示す
図。第６図は処理回路の一例である。第７図は２
つの信号の差の絶対値を得る回路の一例。第８図
は積分回路の一例。第９図はＩＣのフラツトパツ
ケージの形にまとめた本考案装置の実施例を示す
斜視図。第１０図はハーフミラー１６、ミラー１
７の構成と受光素子の配置を示す図で、２７は迷
光を除く為の遮光板を示す。第１１図はハーフミ
ラー１６、ミラー１７、ガラスブロツク１３，１
４，１５と受光素子列３，５とその基板の配置を
示す斜視図。 FIG. 1 is a graph showing the relationship between the amount of defocus and the amount of high frequency components of an image, and shows that the amount of defocus increases as the distance from the defocus amount O (straight line indicating focus) increases and the high frequency components decrease. FIG. 2 is a diagram of a light-receiving element array, and in this example, five light-receiving elements are lined up in a straight line. Figure 3 shows two rows of sensors lined up with the film surface in between. FIG. 4 is a block diagram showing an embodiment of a single-lens reflex camera incorporating the device of the present invention. FIG. 5 is a diagram showing changes in the contrast output obtained by the configuration shown in FIG. 4 depending on the focusing position and the defocus state. FIG. 6 is an example of a processing circuit. Figure 7 is 2
An example of a circuit that obtains the absolute value of the difference between two signals. Figure 8 is an example of an integrating circuit. FIG. 9 is a perspective view showing an embodiment of the device of the present invention in the form of an IC flat package. Figure 10 shows half mirror 16 and mirror 1.
7 is a diagram showing the configuration of numeral 7 and the arrangement of light receiving elements, and numeral 27 indicates a light shielding plate for removing stray light. Figure 11 shows a half mirror 16, a mirror 17, and a glass block 13,1.
4, 15, a perspective view showing the arrangement of light receiving element arrays 3, 5, and their substrates.

Claims

[Claims for Utility Model Registration] 1. A beam splitter that transmits a part of the luminous flux of a photographic lens and reflects the other part, and a reflecting surface that guides the reflected light in parallel with the transmitted light. an optical flat plate having a perpendicular surface; a pair of light receiving element arrays that are installed on a plane parallel to the flat plate and receive images of the two light beams at different optical distances from a photographing lens; and the light receiving elements. at least one light-receiving element installed close to the array, the sensitivity of the pair of light-receiving element arrays to light is adjusted by the photoelectric conversion output of the light-receiving element; A focus detection device for a camera, characterized in that a focus matching state is determined based on a difference in the degree of focus of an image by the above-mentioned photographing lens. 2 Utility Model Registration A focus detection device for a camera according to claim 1, characterized in that a pair of self-scanning image sensors is used as the light-receiving element array. 3. Utility model registration Claim 1: The focus detection device for a camera, wherein the optical plane plate also serves as a protective cover for the light-receiving element array and the light-receiving elements.