To determine the brightness of a projector in white brightness terms, a. Potential problems here are obvious.
Bright light on the floor will scatter right back onto the screen.
How to make a projector screen brighter. Make all the white areas of the image or video clean and bright. Cut a hole in one end of the box (just smaller than your lens), put the lens in/over the hole, place the phone inside the box, prop. In comparison, sunlight or daylight produces 126,666 lux or lumens per square meter since it produces 93 lumens per watt and 1,363 watts per square meter.
All the black areas of the images should be convincing. But lumen output and distance to the screen are inversely related. Turn your projector's brightness control up all of the way, so that the bars become grey, then gradually turn it.
Pull the top end of the fabric over the pipe so that it is completely covered, leaving a little extra room for stitching. Make the projected image size smaller. These short throw projectors are made to cast big screen images from very short distances, though they may require a special short throw projector mount and sometimes have very tight throw ranges.
This might feel really inconvenient to the lighting designer, but lighting a stage with projections is a. To even match 100,000 lux on a screen that size, we would need a single projector capable of projecting 1 million lumens of brightness. The brighter the sun and the more direct sunlight (not too much though) is involved the more lumens you should work with.
So an image that’s twice as big is going to be half as bright. To do this, project a widescreen dvd or other content that has black bars on the screen. Recently i found a neat guide on how to make a video projector out of a shoebox, a magnifying lens, and a smartphone.
It is really important to aim for zero light coming directly from the instrument onto the screen. As neil said, you do get a few extra lumens by zooming larger and moving the pj closer to get the image back within the screen borders (most lenses don't have a fixed 'f' stop so zooming larger lets more light out and reduces contrast, while zooming smaller. If you’re going to use the projector in a completely dark room, then you want to adjust the contrast, blackness, and brightness in that atmosphere.
Keep your projector as close to the screen as you can. One half will be for the screen, while the other is for the wall. Adjust your projector's brightness setting to its optimal level.
If you plan to use your projector in a room where there are no windows, such as a basement, or if you use your projector primarily at night, any of today's projectors will provide a bright image. Shrinking the image will reduce the size and bring out minute details, making the image sharper and brighter. Cut two pieces of pvc pipe to about 1 inch longer than the length of the screen.
Many projectors have a focus feature, allowing you to adjust the sharpness of the image. You can do contrast calibration for a colored display as well. However, the same amount of energy is thrown at the screen.
The first step is to figure out what type of lighting you’re going to have in the room. Moving the projector further from the screen, or zooming out, makes the image larger. Place one pipe at the top of the fabric.
The larger the size of the projected image, the lower the quality of the image. As the projector light hits the projector screen, it reflects times x amount of light greater than the light that is projected onto it, this multiple is called gain. This is 3.562 x 10 28 lumens of brightness.
So a projector screen might have a gain of let’s say 1.5, so 3000 lumens (light shone onto it), hitting a screen with a gain of 1.5 will reflect onto the viewers 3,500 lumens, which is another reason why they are indeed “worth it”. One of the easiest ways is with a wooden fringe cleat. The closer to the projected surface you are, the brighter the actual image will be.
Place the first half of the wooden cleat at the back of the top center of your screen. If you are going to have ambient light, then make adjustments in that setting. Little to no light entering room.
Using your projector's zoom lens to project a large image from a distance can reduce your projector's effective brightness by up to 40.