Lennon
Member
When ordinary users buy a projector, they usually look at various parameters of the projector, such as the projector's lumen, resolution, configuration and other parameters. But for the projector projection distance and the size of the projection screen is actually no number, at this time we will look at the projector throw ratio, then what is speculative throw ratio?
Definition
A related measurement, throw ratio, is the ratio of the distance from the lens to the screen (throw) to the screen width. A larger throw ratio corresponds to a more tightly focused optical system. In fact, the throw ratio is not only a simple definition, it can reflect the changes in projection technology over the years, from the earliest long focus projector to today's short focus projector, the throw ratio is getting smaller and smaller, which makes the projector more widely used, to put it simply, short distance, big picture.
Throw ratio value range
So what is the ratio of the projection to the projector? The throw ratio of ordinary projectors is usually between 1.5 and 1.9. When the throw ratio is less than 1, we usually call it a short-focus lens, and when the throw ratio is less than 0.6, we usually call it an ultrashort focus lens. In addition, the throw ratio can also be a range, because some projectors support zoom, that is, have different size effects at the same distance, users can adjust according to their own needs.
Differences between normal, short focus and ultra-short focus projectors
So we usually encounter the ordinary, short focus, super short focus projector, in the case of fixed projection screen size, the general need for the projection distance? For example, if we want to project a 100-size picture, when the throw ratio is 1.5, the projection distance of the projector is about 10.8 feet. At a throw ratio of 1, the projector projects a distance of about 7.2 feet. At a throw ratio of 0.4, this is what we call a reflective ultrafinfocal-focus laser projector, which typically projects a 100-inch image at a distance of about 1.3 feet.
The original projector needed a distance of two or three meters to project a picture of more than 100 inches, which made most of the projectors choose the hoisting installation method, which is acceptable for fields such as education, because the wiring and installation of the projector have been designed and arranged in advance. However, for some users who do not reserve the projector space, it will be a hassle, and walking around will also affect the aesthetics of the room.
Definition
A related measurement, throw ratio, is the ratio of the distance from the lens to the screen (throw) to the screen width. A larger throw ratio corresponds to a more tightly focused optical system. In fact, the throw ratio is not only a simple definition, it can reflect the changes in projection technology over the years, from the earliest long focus projector to today's short focus projector, the throw ratio is getting smaller and smaller, which makes the projector more widely used, to put it simply, short distance, big picture.
Throw ratio value range
So what is the ratio of the projection to the projector? The throw ratio of ordinary projectors is usually between 1.5 and 1.9. When the throw ratio is less than 1, we usually call it a short-focus lens, and when the throw ratio is less than 0.6, we usually call it an ultrashort focus lens. In addition, the throw ratio can also be a range, because some projectors support zoom, that is, have different size effects at the same distance, users can adjust according to their own needs.
Differences between normal, short focus and ultra-short focus projectors
So we usually encounter the ordinary, short focus, super short focus projector, in the case of fixed projection screen size, the general need for the projection distance? For example, if we want to project a 100-size picture, when the throw ratio is 1.5, the projection distance of the projector is about 10.8 feet. At a throw ratio of 1, the projector projects a distance of about 7.2 feet. At a throw ratio of 0.4, this is what we call a reflective ultrafinfocal-focus laser projector, which typically projects a 100-inch image at a distance of about 1.3 feet.
The original projector needed a distance of two or three meters to project a picture of more than 100 inches, which made most of the projectors choose the hoisting installation method, which is acceptable for fields such as education, because the wiring and installation of the projector have been designed and arranged in advance. However, for some users who do not reserve the projector space, it will be a hassle, and walking around will also affect the aesthetics of the room.
