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CN-224203551-U - Combined backlight source device

CN224203551UCN 224203551 UCN224203551 UCN 224203551UCN-224203551-U

Abstract

The utility model relates to the technical field of light sources, and discloses a combined backlight source device which comprises a bottom light source and a side light source, a spectroscope and an imaging assembly, wherein the bottom light source and the side light source are both irradiated to a target detection position, the spectroscope is positioned at the position where light paths of the bottom light source and the side light source overlap, the bottom light source passes through a transmission light path of the spectroscope and is coaxial with a reflection light path of the side light source passing through the spectroscope, and light rays of the transmission light path and the reflection light path finally merge into the imaging assembly. The side light source directly irradiates the workpiece, is reflected by the beam splitting lens and enters the camera for imaging, and the fine needle outline is detected at multiple angles, so that the detection precision of the fine needle workpiece is remarkably improved.

Inventors

  • ZHANG ZIHAO

Assignees

  • 广东奥普特科技股份有限公司

Dates

Publication Date
20260505
Application Date
20250616

Claims (10)

  1. 1. A combination backlight apparatus, comprising: A bottom light source (21) and a side light source (22), both the bottom light source (21) and the side light source (22) being irradiated at a target detection position; The spectroscope (31) is positioned at the position where the light paths of the bottom light source (21) and the side light source (22) coincide, wherein the transmission light path of the bottom light source (21) passing through the spectroscope (31) is coaxial with the reflection light path of the side light source (22) passing through the spectroscope (31); and the transmission light path and the reflection light path are finally converged into the imaging assembly.
  2. 2. The combination backlight device of claim 1, further comprising a light source housing (10), the light source housing (10) comprising a back cover plate (41), the side light source (22) being mounted inside the back cover plate (41).
  3. 3. The combined backlight device according to claim 2, wherein the light source housing (10) further comprises a left side plate (431) and a right side plate (432), lens clamping grooves (4321) are respectively arranged at corresponding positions of the left side plate (431) and the right side plate (432), and two sides of the spectroscope (31) are respectively fixed in the corresponding lens clamping grooves (4321).
  4. 4. A combined backlight device according to claim 3, wherein the light source housing (10) further comprises a front cover plate (42), a foam clamping groove (421) is formed in the front cover plate (42), the other side edge of the spectroscope (31) is fixed in the foam clamping groove (421), elastic foam (4211) is attached in the foam clamping groove (421), and the elastic foam (4211) is used for extruding and fixing the spectroscope (31).
  5. 5. A combined backlight device according to claim 3, characterized in that the left side plate (431) is provided with a workpiece slot (4311) for placing a workpiece (60) to be inspected, the position of the workpiece slot (4311) corresponding to the target inspection position.
  6. 6. The combination backlight device according to claim 5, wherein the size of the workpiece slot (4311) is adapted to the shape of a fine needle type workpiece, and the edge of the workpiece slot (4311) is provided with a scratch-resistant chamfer.
  7. 7. The combination backlight device according to claim 1, wherein the transmission light path of the bottom light source (21) and the reflection light path of the side light source (22) are coaxially superimposed to form a composite light path, and the composite light path covers the target detection position.
  8. 8. The combination backlight device of claim 7, wherein the imaging assembly comprises an industrial camera (51) and a lens (52), an optical axis of the lens (52) being coaxially aligned with the compound optical path.
  9. 9. The combination backlight device according to claim 1, wherein the beam splitter (31) is a half-mirror, and the ratio of the transmittance to the reflectance of the beam splitter (31) is adapted to the ratio of the light intensities of the bottom light source (21) and the side light source (22).
  10. 10. The combination backlight device according to claim 1, further comprising a control module for synchronously adjusting the brightness and exposure timing of the bottom light source (21) and side light source (22).

Description

Combined backlight source device Technical Field The present utility model relates to the field of light source technologies, and in particular, to a combined backlight device. Background In industrial production, detection of fine needle workpieces is important to control product quality. The traditional detection method generally adopts a single-angle light source for irradiation, however, because the thin needle structure is slender and the surface characteristics are complex, the single light source is difficult to comprehensively and clearly display the complete outline of the thin needle, the problems of outline information deletion, detail blurring and the like easily occur in the detection process, the error exists in the detection result, and the high-precision detection requirement cannot be met. Accordingly, improvements in the art are needed. The above information is presented as background information only to aid in the understanding of the present disclosure and is not intended or admitted to be prior art relative to the present disclosure. Disclosure of utility model The utility model provides a combined backlight source device which solves the problems in the prior art. In order to achieve the above object, the present utility model provides the following technical solutions: a combination backlight apparatus comprising: a bottom light source and a side light source, both of which are irradiated to a target detection position; the spectroscope is positioned at the position where the light paths of the bottom light source and the side light source coincide, wherein the transmission light path of the bottom light source passing through the spectroscope is coaxial with the reflection light path of the side light source passing through the spectroscope; And the light rays of the transmission light path and the reflection light path are finally converged into the imaging assembly. Optionally, the combined backlight device further comprises a light source housing, wherein the light source housing comprises a rear cover plate, and the side light source is arranged on the inner side of the rear cover plate. Optionally, the light source housing further includes a left side plate and a right side plate, lens clamping grooves are respectively arranged at corresponding positions of the left side plate and the right side plate, and two sides of the spectroscope are respectively fixed in a corresponding lens clamping groove. Optionally, the light source housing further comprises a front cover plate, a foam clamping groove is formed in the front cover plate, the other side edge of the spectroscope is fixed in the foam clamping groove, elastic foam is attached in the foam clamping groove, and the elastic foam is used for extruding and fixing the spectroscope. Optionally, the left side plate is provided with a workpiece notch for placing a workpiece to be detected, and the position of the workpiece notch corresponds to the target detection position. Optionally, the size of the workpiece notch is adapted to the shape of the fine needle workpiece, and the edge of the workpiece notch is provided with a scratch-resistant chamfer. Optionally, the transmission light path of the bottom light source and the reflection light path of the side light source are coaxially overlapped to form a composite light path, and the composite light path covers the target detection position. Optionally, the imaging assembly comprises an industrial camera and a lens, an optical axis of the lens being coaxially aligned with the compound optical path. Optionally, the spectroscope is a semi-transparent and semi-reflective lens, and the ratio of the transmissivity and the reflectivity of the spectroscope is adapted to the light intensity ratio of the bottom light source and the side light source. Optionally, the combined backlight device further comprises a control module, wherein the control module is used for synchronously adjusting the brightness and the exposure time sequence of the bottom light source and the side light source. Compared with the prior art, the utility model has the following beneficial effects: The side light source directly irradiates the workpiece, is reflected by the beam splitting lens and enters the camera for imaging, and the precision of fine needle workpiece detection is remarkably improved through multi-angle detection of the fine needle contour. The utility model has other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, taken in conjunction with the accompanying drawings and the detailed description, which illustrate certain principles of the utility model. Drawings In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be bri