JPH02105110U

JPH02105110U -

Info

Publication number: JPH02105110U
Application number: JP1329689U
Authority: JP
Priority date: 1989-02-07
Filing date: 1989-02-07
Publication date: 1990-08-21

Description

[Brief explanation of drawings]

第１図は本考案に係る表裏ズレ検査機の一実施
例を示す縦断面図、第２図ａは上カメラの受像を
示す図、第２図ｂは第２図ａのＡ―Ａ′間の明る
さをグラフ化した図、第３図ａは上カメラの照明
を変化させた状態の受像を示す図、第３図ｂは第
３図ａのＢ―Ｂ′間の明るさをグラフ化した図で
ある。１……上カメラ、２……下カメラ、３，４……
上下ステージ、５，６……リング照明、７，８…
…透過照明、９……テーブル、９ａ……ガラス、
１０……基板、１１……制御部、１１ａ……画像
処理部、１１ｂ……演算処理部、１１ｃ……照明
制御部、１２……架台、１３……基板基準孔、１
４……基準マーク、１５……カメラ中心、ｘα，
ｙα……基板基準孔の中心座標とカメラ視野中心
座標の偏差、ｘβ，ｙβ……フイルム基準マーク
の中心座標とカメラ視野中心座標の偏差、γ，Δ
……スライスレベル。 Fig. 1 is a vertical cross-sectional view showing an embodiment of the front-back misalignment inspection machine according to the present invention, Fig. 2 a is a view showing image reception by the upper camera, and Fig. 2 b is a section between A and A' in Fig. 2 a. Figure 3a is a graph showing the image reception when the illumination of the upper camera is changed. Figure 3b is a graph of the brightness between B and B' in Figure 3a. This is a diagram. 1... Upper camera, 2... Lower camera, 3, 4...
Upper and lower stages, 5, 6...Ring lighting, 7, 8...
...Transmitted illumination, 9...Table, 9a...Glass,
DESCRIPTION OF SYMBOLS 10... Board, 11... Control unit, 11a... Image processing unit, 11b... Arithmetic processing unit, 11c... Lighting control unit, 12... Mount, 13... Board reference hole, 1
4...Reference mark, 15...Camera center, xα,
yα...Difference between the center coordinates of the substrate reference hole and the center coordinates of the camera field of view, xβ, yβ...Deviation between the center coordinates of the film reference mark and the center coordinates of the camera field of view, γ, Δ
...Slice level.

Claims

[Scope of utility model registration request]

an image input device disposed facing each other so as to simultaneously obtain images of the holes of the printed wiring and the reference marks of the film that is the original plate of the circuit from the front and back sides of the printed wiring board;
An image processing mechanism section that measures the center of at least two arbitrary images based on images obtained by an image input device, and an operator who compares the center measurement values of the image processing mechanism section from a certain set value and makes a determination. a calculation mechanism that notifies the
A moving mechanism that allows the focus of the image input device to be varied according to the thickness of the printed wiring board, and a mechanism located near the image input device,
1. A front-back misalignment inspection machine characterized by having a proof section equipped with a mechanism for switching between an image based on reflected light and an image based on transmitted light when obtaining an image of an object to be measured.