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Plane Mirrors
Published in Abdul Al-Azzawi, Light and Optics, 2018
Figure 8.3 shows a virtual image formed by a plane mirror. The images seen in plane mirrors are always virtual for real objects. Real images can usually be displayed on a screen, but virtual images cannot. Some of the properties of the images formed by plane mirrors can be examined using simple geometric techniques shown in Figure 8.3. In order to find out where an image is formed, it is always necessary to follow at least two rays of light as they reflect from the mirror. One of those rays starts at O, follows a horizontal path to the mirror, and reflects back on itself, OA. The second ray follows the oblique path OB and reflects, as shown in Figure 8.3. An observer to the left of the mirror, as shown in this figure, would trace the two reflected rays back to the point from which they appear to originate, point I. A continuation of this process for points on the object other than I would result in a virtual image to the right of the mirror, as shown in this figure. Since triangles OAB and IAB are congruent, OA = IA. Therefore, the image formed by an object placed in front of a plane mirror is the same distance behind the mirror as the object is in front of the mirror.
Plane Mirrors
Published in Abdul Al-Azzawi, Photonics, 2017
Figure 8.3 shows a virtual image formed by a plane mirror. The images seen in plane mirrors are always virtual for real objects. Real images can usually be displayed on a screen, but virtual images cannot. Some of the properties of the images formed by plane mirrors can be examined using simple geometric techniques shown in Figure 8.3. In order to find out where an image is formed, it is always necessary to follow at least two rays of light as they reflect from the mirror. One of those rays starts at O, follows a horizontal path to the mirror, and reflects back on itself, OA. The second ray follows the oblique path OB and reflects, as shown in Figure 8.3. An observer to the left of the mirror, as shown in this figure, would trace the two reflected rays back to the point from which they appear to originate, point I. A continuation of this process for points on the object other than I would result in a virtual image to the right of the mirror, as shown in this figure. Since triangles OAB and IAB are congruent, OA = IA. Therefore, the image formed by an object placed in front of a plane mirror is the same distance behind the mirror as the object is in front of the mirror.
Optics Components and Electronic Equipment
Published in Vadim Backman, Adam Wax, Hao F. Zhang, A Laboratory Manual in Biophotonics, 2018
Vadim Backman, Adam Wax, Hao F. Zhang
Light rays striking the mirror's flat surface reflect at an angle that is similar to its incident angle (Figure 2.9). A plane mirror forms an image that appears to be behind the plane in which the mirror lies. The formed image is always a virtual image in that light rays do not actually originate from the image upright and of the same shape and size but are laterally inverted.
Image processing algorithm for mechanical properties testing of high-temperature materials based on time-frequency analysis
Published in Journal of Experimental Nanoscience, 2023
In order to reduce this effect, we changed the system structure of the camera perpendicular to the test piece in the monocular measurement, placed the camera parallel to the test piece, and placed a plane mirror with a precision adjustment frame between the test piece and the camera, The function of dynamically compensating the thermal lens error is realized. When the distance between the measured object and the plane mirror is known, the imaging position can be changed by adjusting the angles of the plane mirror in different directions. With the change of temperature, the imaging of the object is shifted, and the imaging of the object can be moved in the opposite direction in combination with this optical path compensation method, so that the thermal lens effect can be compensated at different temperatures. The components of DM and DB along the motion direction of the platform at different times of the two sub-regions in each deformed image are calculated, and the data are shown in Figure 3.
Students’ ability to use geometry knowledge in solving problems of geometrical optics
Published in International Journal of Mathematical Education in Science and Technology, 2023
Aneta Gacovska Barandovska, Boce Mitrevski, Lambe Barandovski
The topics from geometrical optics learned in primary and high school are given as follows: 8th-grade geometrical optics material: types of light sources, propagation of light, point and non-point light sources, shadows, the speed of light and Roemer’s method, reflection of light, the law of reflection, plane mirror and image formation, refraction of light (descriptive approach), total internal reflection, spherical mirrors, spectrum of white light, dispersion of light, lenses and image formation, human eye as an optical system, additive, and subtractive colour mixing.3rd class geometrical optics material: nature of light, speed of light, propagation of light (transmission, reflection, and refraction), the law of reflection and law of refraction of light, total internal reflection, rainbow, plane mirror and image formation, spherical mirrors and image formation, lenses and image formation, optical instruments (magnifying glass and microscope).
Diode-pumped passively mode-locked Nd:GYSGG laser at 1061 nm with periodically poled LiNbO3 nonlinear mirror
Published in Journal of Modern Optics, 2020
Fangxin Cai, Luyang Tong, Ye Yuan, Yangjian Cai, Lina Zhao
The schematic experimental layout of the nonlinear mirror (NLM) mode-locked laser is shown in Figure 1. The gain medium is a Nd:GYSGG crystal with the dimensions of 8 mm × 4 mm × 4 mm and it is mounted in a water-cooled copper holder. The pump source is a fiber-coupled diode-laser with a maximum output power of 30 W at 808 nm and the core diameter is 400 μm. Pump light is imaged on the laser crystal through a 1:0.5 optical coupling system. The beam diameter on laser crystal is 200 μm. The input mirror M1 is a plane mirror with high transmissivity (T>98%) at 808nm on both sides and high reflection(R>99.5%) at 1061 nm on left side. It is placed close to the laser crystal. M2 and M3 are concave mirrors with curvature radius of 500 and 200 mm respectively and have high reflection (R>99%) at 1061 nm. M4 is a dichroic output coupler with high reflection for SH and partial reflection for FW.