TH31426A - A hand-held optical document reader especially useful as an electronic translator. - Google Patents

Abstract

DC60 optical document reader including scanner head, rollers that can be overlapped by recorder. This roller includes a light readable marker, a light mechanism. And a receiver which provides light Light and detect both rollers And a recorder, a lens for adjusting the focus light from the recorder onto Receiver, and a mirror lens for adjusting the focus light from a roller onto the receiver. Optical document reader including scanner head, rollers that can be overlapped by recorder This roller includes a light readable marker, a light mechanism. And a receiver which provides light Light and detect both rollers And a recorder, a lens for adjusting the focus light from the recorder onto Receiver, and a mirror lens for adjusting the focus light from a roller onto the receiver.

Claims (9)

1.Optical scanner consisting of Hand-held cover, which includes; Scanner head for scanning the recording medium; Rollers that overlap and be rotated by the medium for such records when being scanned by the scanner head. The roller has a light-sensitive marking element for use in Measure the rolling motion of the roller; Illuminator for illuminating the recording medium And such rollers Which contains the part thereof; Optical transducer for detecting information on the recording medium and such marks on the roller. And for producing an output corresponding to that section; First optical system with a focus-adjusting lens portion For adjusting focus Light reflected by the recording medium Onto the detector to recognize such optical signals; and A second optical system for focusing the light reflected from the roller. Onto the detector to recognize such optical signals; The second optical system incorporates the aforementioned focusing lenses of the system. Working with first light The second optical system is additionally equipped with a lens attachment. Mirror which has: One surface facing the focusing lens. For the light reflected by The roller, the second surface facing the photodetector, recognizes the optical signal. For light transmission From the glass lens assembly to the optical detectors; And the surface for the third reflection For the second one comes from the surface And for reflecting the received light By passing the aforementioned surface to the optical sensor; At least one such face diverts light against each other. To adjust the resulting light focus Get some In order to compensate for the distance between the combined lenses With rollers shorter than the distance between Optical lens and recording element 2. Optical scanner according to claim 1, one of which is the surface of the face. Diverting Where the reflecting face is a plane And the second surface remains plane and is tilted so that it is truly perpendicular to the light received by the roller and is reflected by the reflecting face through that second surface. 3. Optical Scanner, as stated in either Claim 1 or 2. The enclosure continues to contain a pilot guide for the scanner head movement. Above the recording medium. 4. Optical scanner in accordance with claim 3, which the pilot will be equipped with. With a light source being positioned within the said enclosure And a mirror inside the enclosure for projecting the beam to the side Through the opening in the casing in the direction of movement Of the scanner head Which will be scrolled over the recording medium. 5. Optical scanner according to claim 3, the pilot also includes A transparent pilot assembly that is fixed to the casing. And includes the cursor line Spanning in the direction of the scanner head that will be shifted over the recording medium. 6. Optical scanner according to claim 5, which includes the aforementioned pilot. Light source within the casing For illuminating the inner surface of the assembly. Such translucent pilot 7. Optical scanners pursuant to claim 1, whose lighting path consists of: one light source to illuminate the recording medium; A second light source for illuminating the roller; And a control system for energizing the first such light source periodically during a preset period. And a second light source thereof during the time Other predefined This allows the optical receiver to detect both the information on the recording medium and the markings of the rollers. 8. Optical scanner according to claim 1, which the optical scanner Such includes Linear array of spanned optical detectors Parallel to the spindle of such rollers And the aforementioned light-sensitive marks consisted of lines At least one of the strands extends into a spiral pattern on the outer surface of the rolling bolt. 9. Optical scanner according to claim 8, which the roller includes. At least one reference line extending around the circumference of the roller at the opposite end of the line. That is a circular spiral 1 0. Optical scanner according to claim 1, which the enclosure also includes. Programmed circuit To check the optical detector output for the first time when the scanner head is not in contact with the medium, save it to make sure the output is below the start shift level. Preset number one And later to check the output of the optical scanner when The scanner head touches the recording medium to make sure its output is above the starting level. Change the second predefined Before the electrical circuit is processed the output of the photodetector.