Optical information reading apparatus
A technology for optical information and reading devices, applied in the direction of electromagnetic radiation induction, etc., can solve problems such as deterioration of transmission focusing beam efficiency, laser beam loss, etc.
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no. 1 example
[0046] figure 1According to the first embodiment of the present invention, it schematically illustrates a partial cross-sectional side view of the structure of the gun-shaped two-dimensional code reader CR; FIG. 2 schematically illustrates the two-dimensional code reader according to the first embodiment Schematic diagram of the electrical structure of CR.
[0047] Such as figure 1 As shown, according to the first embodiment of the present invention, as an example of an apparatus for optically reading an object, a two-dimensional code reader CR is provided with a gun-shaped housing 11 . For example, the gun-shaped case 11 has an elongated rectangular parallelepiped main body 11a. One side end portion of the main body 11a is circular.
[0048] The gun-shaped housing 11 is on one side of a lateral end face portion of the main body 11a (specifically, figure 1 The bottom part of the body) is equipped with a handle portion 11b extending in a direction away from the main body...
no. 2 example
[0113] Figure 6 and 7 The second embodiment of the present invention has been described. The description of the elements in the two-dimensional code reader of the second embodiment is basically the same as that of the code reader CR according to the first embodiment except for the marking beam irradiating device according to the second embodiment, and is omitted here or simplify. That is, the description will focus on the structure of the marker beam irradiating device according to the second embodiment.
[0114] In the second embodiment, a marking beam irradiating device 41 differs from the marking beam irradiating device 16 of the first embodiment in that the condensing lens 34 is replaced by a condensing lens 42 .
[0115] In particular, the collecting lens 42 has a concave output surface 42a. The condensing lens 42 serves to condense the emitted divergent laser beam into a substantially circular profile (substantially elliptical profile) in its cross section. The con...
no. 3 example
[0121] Fig. 8A illustrates a third embodiment of the present invention. The description of the elements in the two-dimensional code reader of the third embodiment, except for the marking beam irradiating device according to the third embodiment, is basically the same as that of the code reader CR according to the first embodiment, and is omitted here. or simplified. That is, the description will focus on the structure of the marker beam irradiating device according to the third embodiment.
[0122] In the third embodiment, as illustrated in FIG. 8B , the predetermined beam pattern of the marking beam M1 according to the third embodiment includes a central pattern element M1a corresponding to the central position of the FOV of the photodetector. In addition, the predetermined beam pattern of the marking beam M1 further includes a pair of linear graphic elements M1b and M1d vertically surrounding the central graphic element M1a to emphasize the central graphic element M1a. In ...
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