since you need to show the image on a big screen so you require a diverging lens i.e. a concave lens
projector have concave or convex
No, a movie projector uses a convex lens.
There are many websites that provide DIY projector plans, But none offer a way to repair a Projector Lens. I would look into how much it is to replace the Lens or the projector all together.
To make the projector image smaller, you can adjust the lens by moving it closer to the projector. This will focus the light and reduce the size of the image displayed on the screen.
Convex lens because i said so
Convex lens because i said so
The lens focuses light on the retina (fish have one)
place the lens cap in place.
To select a Fresnel lens for a home projector, first determine the desired projection size and distance from the lens to the screen. Look for a lens with a suitable focal length that matches your projection setup, typically around 10-20 inches for small projects. Ensure the lens has a high-quality optical clarity to minimize distortion. Finally, consider the lens size and shape to fit your projector design and housing.
since you need to show the image on a big screen so you require a diverging lens i.e. a concave lens
A projector lens diagram typically includes components such as the lens barrel, lens elements, aperture, and focal length. The functions of these components are to focus and project light onto a screen, control the amount of light passing through the lens, and determine the size and clarity of the projected image.
Convex lens because i said so