A method for measuring an eye-mounted display FOV

Abstract

The invention discloses a method for measuring an eye-mounted display FOV. The method comprises the following steps of (1) enabling the eye-mounted display equipment to play a test image, monitoring and collecting contents of two eyes of an eye-mounted display by two micro wide-angle cameras embedded into a head frame, respectively obtaining test image matrixes TL and TR, and inputting the test image matrixes TL and TR into signal processing equipment; (2) using the signal processing device to judge whether the wearing position of the eye-mounted display is correct or not, if yes, using the eye-mounted display to play a white field image, and using the camera to collect the white field image matrixes WL and WR and input the white field image matrixes WL and WR into the signal processing device; and (3) using the signal processing equipment to perform the distortion removal processing on the eye-mounted display equipment, and calculate the FOV of the eye-mounted display equipment in combination with a camera visual angle and a related image processing algorithm. According to the method, the tedious preparation work such as experimental environment establishment and correction beforeoptical measurement is simplified, the cost is reduced, the binocular measurement can be carried out at the same time, the time consumption of the whole measurement process is greatly reduced, and the method is suitable for multiple types of NED measurement.

Description

technical field [0001] The invention relates to the technical field of optical property evaluation, in particular to a method for measuring FOV of an eye-mounted display. Background technique [0002] With the development of display technology, eye-mounted displays (NED, Near-Eye Display) represented by VR / AR glasses and other equipment are gradually entering people's lives due to their portability, strong immersion, and wide range of uses. Although there are endless technological achievements in the design and optimization of eye-mounted displays themselves, there are relatively few related studies on the measurement of eye-mounted display devices. Being able to accurately and conveniently measure the optical properties of eye-mounted display devices is a necessary link to grasp production product control, improve device quality, and improve user experience. Among them, FOV (field of view) is closely related to user experience, and it is the most important of all optical p...

AI Technical Summary

Problems solved by technology

However, for the point luminance meter, the preparation process before measurement is very cumbersome: in order to ensure that the optical axis is parallel and the measured angle is accurate, it is necessary to use a sample stage and a goniometer that support the movement of the Cartesian coordinate system and the spherical coordinate system, and it is necessary to record a large number of Coordinates to prevent measurement errors caused by origin movement

As for the surface luminance meter, although there is no need to frequently move the angle, its larger entrance pupil will lead to inaccurate luminance measurement, and if the entrance pupil is manually reduced, the amount of incoming light will be reduced, which will also affect the luminance measurement

On the other hand, the exit pupil distance of NED is generally 15-30mm, which means that the used photometer lens needs to be very close to the eyepiece of NED; however, due to the various shapes of NED products on the market, only one It is difficult for a photometer to match the rich shape parameters, and using multiple photometers will undoubtedly increase the cost

In addition, due to the design of the NED's optical system, the displayed content often introduces distortion. At this time, the FOV measured only by brightness and coordinate information is obviously inaccurate

Therefore, it is not only time-consuming and labor-intensive to measure eye-mounted display devices using the luminance meter method, but it is also difficult to obtain accurate results

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