PINHOLE CAMERA - DIY kit for Students

The pinhole camera is the simplest kind of camera. It does not have a lens. It just makes use of a tiny opening (a pinhole-sized opening) to focus all light rays within the smallest possible area to obtain an image, as clearly as possible. The simple image formed using a pinhole camera is always inverted.

MATERIAL

Translucent screen

Outer Box

Inner Box

WHAT NEXT? Take the Pinhole camera box to a dimly lit room and turn on a lamp.

Stand about 5 feet from the lamp. Cover your head and pinhole camera with a blanket. Be sure that the end with the Translucent screen is facing you and the end with the pinhole is facing the lamp. Hold your pinhole camera at arms length from your face and aim it at the lamp. Keep it steady until you see an upside-down image of the lamp. The image of the outer object is created inverted on the inner box translucent screen.

FOR YOUR INFORMATION- The box should be painted black from outside and inside for better clarity.

- The object whose image is to be seen should be in bright light. - Smaller the hole, sharper the image. - Temporary Black and White images are formed on the screen if a tracing paper is used. Permanent colored and b & w images can be obtained using photographic films instead of tracing paper. - If the size of the hole in a pinhole camera is as big as the size of a green gram then the sharpness in the image decreases. The image becomes thick and the image is a blur. If the size of the hole of a pinhole camera increases then more light enters and disturbs the formation of the image.

PINHOLE CAMERA IMAGE CHARACTERISTICS-

1. A real image is obtained as the image is obtained

on the screen.

2. The size of the image obtained is comparatively smaller than the actual object.

3. The image is inverted on the x-axis as well as on the y-axis.

4. The image can be used in the analysis of the rectilinear propagation of the light.

5. What are the Uses of a Pinhole Camera?

6. The image formed by a pinhole camera may be projected onto a translucent screen for a real-time viewing or safe observation of the solar eclipse.

7. A common use of pinhole photography is to capture the movement of the sun over a long period of time.

8. Pinhole cameras are sometimes used for surveillance because they are difficult to detect.