Near infrared cameraRaspberry Pi

A microscope is used for viewing small things; the first microscope was a single lens used as a simple magnifier. Today we usually mean a two-lens or compound microscope when we say "microscope". Of course each "lens" in our simple sketch in Figure 19.16 may actually be made of several elements to reduce aberrations. The first lens, the one near the object, is known as the objective lens and the second lens, the one near the viewer's eye, is known as the eyepiece lens (or the ocular lens). For a typical microscope, these will both be lenses of short focal length, just a couple of centimeters or so. Figure 19.16 A compound microscope. The final image is a virtual image and may be located at infinity. As shown in Figure 19.16 an object is placed just beyond the focal length of the objective lens. With the object's being beyond the focal length, a real image is formed as shown; a card could be held inside the microscope tube and this image would be projected upon it. The objective lens forms a real image that is larger than the object. The positions of the lenses are adjusted so this image formed by the objective lens falls just inside the focal length of the eyepiece. The eyepiece is then used as a simple magnifier to view this image; this image acts as the object for the eyepiece. Since this object for the eyepiece lies inside the focal length, an enlarged, virtual image will be produced. The eyepiece may be focused so this virtual image is at infinity-or wherever is comfortable for the viewer. [Prev Section] [Next Section] [Table of Contents] [Chapter Contents]

[Prev Section] [Next Section] [Table of Contents] [Chapter Contents] A microscope is used for viewing small things; the first microscope was a single lens used as a simple magnifier. Today we usually mean a two-lens or compound microscope when we say "microscope". Of course each "lens" in our simple sketch in Figure 19.16 may actually be made of several elements to reduce aberrations. The first lens, the one near the object, is known as the objective lens and the second lens, the one near the viewer's eye, is known as the eyepiece lens (or the ocular lens). For a typical microscope, these will both be lenses of short focal length, just a couple of centimeters or so. Figure 19.16 A compound microscope. The final image is a virtual image and may be located at infinity. As shown in Figure 19.16 an object is placed just beyond the focal length of the objective lens. With the object's being beyond the focal length, a real image is formed as shown; a card could be held inside the microscope tube and this image would be projected upon it. The objective lens forms a real image that is larger than the object. The positions of the lenses are adjusted so this image formed by the objective lens falls just inside the focal length of the eyepiece. The eyepiece is then used as a simple magnifier to view this image; this image acts as the object for the eyepiece. Since this object for the eyepiece lies inside the focal length, an enlarged, virtual image will be produced. The eyepiece may be focused so this virtual image is at infinity-or wherever is comfortable for the viewer. [Prev Section] [Next Section] [Table of Contents] [Chapter Contents]

A microscope is used for viewing small things; the first microscope was a single lens used as a simple magnifier. Today we usually mean a two-lens or compound microscope when we say "microscope". Of course each "lens" in our simple sketch in Figure 19.16 may actually be made of several elements to reduce aberrations. The first lens, the one near the object, is known as the objective lens and the second lens, the one near the viewer's eye, is known as the eyepiece lens (or the ocular lens). For a typical microscope, these will both be lenses of short focal length, just a couple of centimeters or so. Figure 19.16 A compound microscope. The final image is a virtual image and may be located at infinity. As shown in Figure 19.16 an object is placed just beyond the focal length of the objective lens. With the object's being beyond the focal length, a real image is formed as shown; a card could be held inside the microscope tube and this image would be projected upon it. The objective lens forms a real image that is larger than the object. The positions of the lenses are adjusted so this image formed by the objective lens falls just inside the focal length of the eyepiece. The eyepiece is then used as a simple magnifier to view this image; this image acts as the object for the eyepiece. Since this object for the eyepiece lies inside the focal length, an enlarged, virtual image will be produced. The eyepiece may be focused so this virtual image is at infinity-or wherever is comfortable for the viewer. [Prev Section] [Next Section] [Table of Contents] [Chapter Contents]

Near infrared cameraapp

Figure 19.16 A compound microscope. The final image is a virtual image and may be located at infinity. As shown in Figure 19.16 an object is placed just beyond the focal length of the objective lens. With the object's being beyond the focal length, a real image is formed as shown; a card could be held inside the microscope tube and this image would be projected upon it. The objective lens forms a real image that is larger than the object. The positions of the lenses are adjusted so this image formed by the objective lens falls just inside the focal length of the eyepiece. The eyepiece is then used as a simple magnifier to view this image; this image acts as the object for the eyepiece. Since this object for the eyepiece lies inside the focal length, an enlarged, virtual image will be produced. The eyepiece may be focused so this virtual image is at infinity-or wherever is comfortable for the viewer.

As shown in Figure 19.16 an object is placed just beyond the focal length of the objective lens. With the object's being beyond the focal length, a real image is formed as shown; a card could be held inside the microscope tube and this image would be projected upon it. The objective lens forms a real image that is larger than the object. The positions of the lenses are adjusted so this image formed by the objective lens falls just inside the focal length of the eyepiece. The eyepiece is then used as a simple magnifier to view this image; this image acts as the object for the eyepiece. Since this object for the eyepiece lies inside the focal length, an enlarged, virtual image will be produced. The eyepiece may be focused so this virtual image is at infinity-or wherever is comfortable for the viewer.

Near Infrared Cameraprice

19.5 Microscope [Prev Section] [Next Section] [Table of Contents] [Chapter Contents] A microscope is used for viewing small things; the first microscope was a single lens used as a simple magnifier. Today we usually mean a two-lens or compound microscope when we say "microscope". Of course each "lens" in our simple sketch in Figure 19.16 may actually be made of several elements to reduce aberrations. The first lens, the one near the object, is known as the objective lens and the second lens, the one near the viewer's eye, is known as the eyepiece lens (or the ocular lens). For a typical microscope, these will both be lenses of short focal length, just a couple of centimeters or so. Figure 19.16 A compound microscope. The final image is a virtual image and may be located at infinity. As shown in Figure 19.16 an object is placed just beyond the focal length of the objective lens. With the object's being beyond the focal length, a real image is formed as shown; a card could be held inside the microscope tube and this image would be projected upon it. The objective lens forms a real image that is larger than the object. The positions of the lenses are adjusted so this image formed by the objective lens falls just inside the focal length of the eyepiece. The eyepiece is then used as a simple magnifier to view this image; this image acts as the object for the eyepiece. Since this object for the eyepiece lies inside the focal length, an enlarged, virtual image will be produced. The eyepiece may be focused so this virtual image is at infinity-or wherever is comfortable for the viewer. [Prev Section] [Next Section] [Table of Contents] [Chapter Contents]

Figure 19.16 A compound microscope. The final image is a virtual image and may be located at infinity. As shown in Figure 19.16 an object is placed just beyond the focal length of the objective lens. With the object's being beyond the focal length, a real image is formed as shown; a card could be held inside the microscope tube and this image would be projected upon it. The objective lens forms a real image that is larger than the object. The positions of the lenses are adjusted so this image formed by the objective lens falls just inside the focal length of the eyepiece. The eyepiece is then used as a simple magnifier to view this image; this image acts as the object for the eyepiece. Since this object for the eyepiece lies inside the focal length, an enlarged, virtual image will be produced. The eyepiece may be focused so this virtual image is at infinity-or wherever is comfortable for the viewer.