I. Gomez, Hilarion Kiril A.

II. Pinhole Projector

III. Methodology and Theory

A. Theory

A pinhole is made by creating a hole in a surface. In this experiment, the pinhole

was made by making an extremely small hole in a box with the tip of a pin. This

pinhole projects an image if necessary conditions are met. This pinhole projection

works on a simple principle.

The principle lies in having a large, dark, room-sized box containing a pinhole.

Then, imagine your friend is outside the box with a flashlight. Now, he is pointing the

beam from the flashlight through the pinhole and as you look at the opposite side of

the pinhole, you can see a small dot coming from the flashlight. As it can be observe,

the smaller the pinhole, the smaller and sharper the dot that the flashlight creates.1

Likewise, the box serves as the dark room which shields the other light source from

coming in contact on the inside of the opposite side of the pinhole. This shielding

allows the pinhole to project or concentrate its light on a certain part of the box which

thereby creating an image of which the pinhole is projected towards to.

B. Methodology

The materials needed were gathered like shoebox, bondpaper glued on

Styrofoam, oil, tape and a pin. The pinhole was made by the tip of the pin. The

image will be projected on the surface of the bondpaper glued on a Styrofoam.

The oil is then put on the bondpaper glued on a Styrofoam The researcher made a

viewing port with a cutter.

The researcher then projects an image of nearby objects (in this case, building and

fluorescent) by pointing the pinhole on the object. The researcher then, observe

the images projected by the pinhole.

1 How does a pinhole camera work? - HowStuffWorks. (n.d.). Retrieved from

http://electronics.howstuffworks.com/question1

IV. Data and Results

Figure 1. Researchers on the process of making the pinhole projector.

Figure 2a. Distant object observed by the researchers.

Figure 2b. The image projected by the distant object observed by the

researchers.

Figure 3. The nearby object observed by the researchers, a fluorescent lamp

(left) and the image projected on the screen by the pinhole projector (right).

V. Conclusion and Recommendation

A. Conclusion

The researcher concludes that the pinhole projector works by having a pinhole

on a sealed box to project an image on a smooth surface which in this

experiment the surface is an oiled bondpaper glued on a Styrofoam. The light

coming from the pinhole were focused to project an image of the object

pointed towards it. As it can be observed, the image projected on the screen by

the pinhole projector is inverted and reversed.

B. Recommendation

The researcher recommends to experiment on a sunny day, make the pinhole

as small as possible and try to make a pinhole projector with another shape

like cylinder.

VI. Reference

How does a pinhole camera work? - HowStuffWorks. (n.d.). Retrieved from

http://electronics.howstuffworks.com/question131.htm