Physics-method of making camera model

1 convex lens (focal length is within 10cm), 1 0cm× 8cm thin frosted glass, 1 thin cardboard, 1 bottle of glue,1scissors, some toilet paper.

2. Production steps

① Making black box: Fold the thin cardboard into a black box frame of 10.5cm× 8.5cm× 5.0cm, bond the joints firmly, and fold the four corners into triangular columns with horse manure paper for bonding and reinforcement.

② Fixing the image screen: use thin cardboard as the frame of frosted glass (see figure Guang- 13), leave a 1cm-wide outward fold at the edge of the frame and fix it in a black box frame.

(3) Making the lens barrel: making the frame of the convex lens with thin cardboard, and then making the lens barrel with thin cardboard. The lens barrel is divided into inner and outer parts. The inner lens barrel of the outer lens barrel can move back and forth in it. The convex lens is fixed at the front end of the inner lens barrel, and the method of fixing the lens refers to the method of fixing the image screen. The length of each lens barrel is only 3-4 cm.

④ Making the panel: cut out 1 1cm× 9cm toilet paper, dig a round hole with the same diameter as the external mirror at the diagonal intersection, fix the external lens tube on the round hole, and then fix the panel on the frame of the black box.

⑤ Seal the black box and panel for light leakage.

⑥ Insert the inner barrel of the lens into the outer barrel. Adjust the position of the lens back and forth and observe the image on the ground glass at the same time. Clearly adjust the image of the object in the field of vision.