Search found 366 matches

by OBNRacerMan
03 Apr 2022, 14:59
Forum: Structured light scanning
Topic: Few questions about ScanCenter
Replies: 45
Views: 31340

Re: Few questions about ScanCenter

Convergence angle between cameras - 20-22°. I have an angle of 20 ° fixed in the mounts. The vertical angles are also fixed by the scanner frame design. When working, I only set the distance between the cameras according to the calibration tables used. IMG_20211129_203741s.jpg IMG_20211129_232458s.j...
by OBNRacerMan
02 Apr 2022, 17:15
Forum: Structured light scanning
Topic: Few questions about ScanCenter
Replies: 45
Views: 31340

Re: Few questions about ScanCenter

You also need to understand that working with blue backlight severely limits both the power of the projector (since only one (blue) LED works in this case) and the band-pass filter itself limits the sensitivity of the camera. P.S. And this mode (as far as I know) is required only if it is not possib...
by OBNRacerMan
02 Apr 2022, 16:08
Forum: Structured light scanning
Topic: Few questions about ScanCenter
Replies: 45
Views: 31340

Re: Few questions about ScanCenter

Hello.
1. A slight deviation of the "crosses" during calibration does not play a role.
2. The dimension of the focal length of 12mm or 12.5mm lenses also does not matter.
3. To realize full-fledged blue-light processing, BP470 type band-pass filters with a bandwidth of 470nm are required.
by OBNRacerMan
17 Feb 2022, 06:33
Forum: Hardware/Accessoires
Topic: MindVision SUA630M (USB3.0 IMX178)
Replies: 23
Views: 36158

Re: MindVision SUA630M (USB3.0 IMX178)

Is the MindVision SUA630M available for purchase in the USA? I once bought these cameras on aliexpress. But now I do not see these cameras for sale. I think it's easier for you to find similar cameras from other manufacturers - Basler acA3088-57um, IDS UI-3880CP-M-GL Rev.2 or Daheng MER-630-60U3M-L
by OBNRacerMan
01 Feb 2022, 20:02
Forum: Structured light scanning
Topic: Projector for Range Vision DIY and Daheng cameras
Replies: 5
Views: 13359

Re: Projector for Range Vision DIY and Daheng cameras

Nice. Do you use some custom macro tubes for your ZLKC lenses or those extensions (back tubes between lens and camera) are possible to buy? These are not "tubes" - this is the front of the camera I see also that the camera sensor and projector lamp are not aligned in one line. In David wa...
by OBNRacerMan
01 Feb 2022, 16:17
Forum: Structured light scanning
Topic: Projector for Range Vision DIY and Daheng cameras
Replies: 5
Views: 13359

Re: Projector for Range Vision DIY and Daheng cameras

Hi. I'm using the predecessor - LG PF1500 - technically the LG HF60 is identical to my projector (same projection module and optics). Therefore, the real minimum distance at which the projector can focus without any additional things is 26cm. That allows it to be used in a wide range of scanning tas...
by OBNRacerMan
13 Jan 2022, 18:23
Forum: Photogrammetry
Topic: photogrammetry for ditches
Replies: 2
Views: 7219

Re: photogrammetry for ditches

Watch a video on phogrammetry of industrial facilities on YouTube - using aerial photography (or using drones), you can accurately calculate the volume of embankments or dug pits. Here is one example https://youtu.be/yZKathXREYU There are also a large number of programs for photogrammetry, ranging f...
by OBNRacerMan
03 Jan 2022, 21:47
Forum: Structured light scanning
Topic: Questions about RV Daheng low distortion lens for David SLS-2 projector K132
Replies: 6
Views: 8935

Re: Questions about RV Daheng low distortion lens for David SLS-2 projector K132

The initial curvature of a 12mm / 10MP objective lens does not differ from a 12mm / 5MP objective - this value is only an indicator of the quality of the lenses and their maximum resolution according to a special measuring world. The very distortions introduced by the lenses are compensated (to some...
by OBNRacerMan
03 Jan 2022, 16:05
Forum: Structured light scanning
Topic: Questions about RV Daheng low distortion lens for David SLS-2 projector K132
Replies: 6
Views: 8935

Re: Questions about RV Daheng low distortion lens for David SLS-2 projector K132

Unfortunately, I didn’t have any experience with a projector like yours. But for large scanning areas, the most versatile (for many scanner models) is a 12mm focal length lens. 16mm is needed for scanning small objects, and 25mm for very small objects. I am starting from the basic scope of delivery ...