I have a light beam profile. I have pojected the beam onto a paper. It is as seen in the picture below named 1.

When I directed the same beam to a usb camera (brand: the image source) I see the second image. They are not same. I have tried it without any lens and with a lens with 18 mm focal length.

Why can't I see the same image? What can I do to see the same image?

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