15-04-2009 дата публикации
Номер: CN0101408557A
Принадлежит:
The invention relates to a light table used for the detection of a circuit board. The light table comprises a worktable, an outer housing arranged on the worktable and at least a light source, and the invention is characterized in that the light table further comprises a beam condensing unit; the condensing unit comprises a first cylindrical shell, a rotation part, a sliding axle and a lens system, wherein, the first cylindrical shell is arranged on the worktable, the rotation part comprises a rotating shaft and a second cylindrical shell; one end of the rotating shaft penetrates in the first cylindrical shell, the other end thereof is connected with the second cylindrical shell, one end of the sliding shaft penetrates in the second cylindrical in a sliding way and the other end thereof is connected with the lens system. The light table of the invention increases the surface lightness of the circuit board arranged on the light table but does not increase the electrical power consumption ...
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