Direct image transmission FOP Fiber Optic Plates FOP Allows compact optical design with high resolution An FOP can be directly coupled to solid state imaging devices such as CCD and CMOS image sensors. Unlike a normal optical lens, FOP requires no space for focusing distance and so allows a flexible compact optical design. Direct image transmission FOP Fiber Optic Plates Lens CCD/CMOS etc. CCD/CMOS etc. The FOP (fiber optic plate) is an optical device comprised of a bunOVERVIEW dle of micron-diameter optical fibers. The FOP directly conveys light or image incident on its input surface to its output surface. A fixed focusing distance is required Compact optical design by direct coupling FEATURES Effective for X-ray shielding ◆No focusing distance required allows simple and compact optical design ◆Superb X-ray shielding ability The X-ray shielding type FOP has a shielding capability about 5 times higher than a standard FOP when exposed to X-rays emitted from a 70 kV X-ray tube (comparison made using a 3 mm thick FOP). When an FOP is used as the light-receiving surface of a camera, it prevents the image sensor in the camera from deteriorating due to exposure to X-rays. (X-ray shielding type) ◆Image magnification and reduction FOP (X-ray shielding type) CCD/CMOS etc. X-rays (tapered fiber optics) ◆Customized products available ◆All products RoHS compliant Low-NA-FOP Hamamatsu also provides FOP with a low NA (numerical aperture). In this type of FOP, light incident at an angle exceeding the maximum acceptance angle is absorbed by the absorber material. So this FOP is ideal when extracting only light having a small incident angle. CONSTRUCTION The basic element of an FOP consists of a single fiber that conveys light and an absorber glass that absorbs light leaking from the fiber. In each single fiber, light is conveyed by total reflection that occurs at the boundary between the core glass and the cladding glass due to the difference in their refractive index. As shown in the figure on the right, when light (shown by broken line) enters a fiber at an angle θ (theta) greater than the maximum acceptance angle θ1, it does not totally reflect and exits the fiber. However, that light is absorbed by the absorber glass so that it will not reach the next fibers. This feature allows optical images to transmit through each fiber without degrading the resolution. Standard type Low-NA type Tapered fiber optics for image magnification or reduction Cladding glass Air n=1 θ1 n1 n0 θ Core glass Images are transmitted since the FOP is a bundle of tens of millions of single fibers, each of which conveys light. These are tapered FOPs fabricated by heat treatment to have a different size ratio between their input and output surfaces. This magnifies or reduces the input image at the desired ratio. The magnification/reduction ratio for a standard tapered FOP is 1:2 or 2:3 but can be varied up to a maximum of 1:5. FOP Fiber Optic Plates ■SPECIFICATIONS Item Tapered fiber optics Fiber optic plate Type No. J3182 J11181 J11057 J12221 FOP type Standard Standard X-ray shielding Low-NA J5734 High resolution J5743 Taper (Ratio 2:1) Unit — Numerical aperture (N.A.) 1.0 0.43 1.0 1.0 — Maximum acceptance angle (full angle) 180 51 180 180 deg. Fiber diameter Resolution *1 Transmittance*2 6 25 3 6 (large end) µm 102 28.5 161 102 Lp/mm % Collimated light 73 73 70 45 79 63 Diffused light 63 63 66 6 60 15 % 85 84 77 93 85 84 ×10-7/°C Coefficient of thermal expansion *3 Absorber Yes — *1: Test target USAF1951 (reference values) *2: at 550 nm wavelength *3: at 100 °C to 300 °C ■OUTSIDE DIMENSIONS Type No. Suffix Shape (mm) J3182 -72 30.0 × 20.0 × 3.0 t J11057 -73 50.0 × 50.0 × 3.0 t J12221 -74 26.5 × 3.0 t J11057 / J11181 -75 100.0 × 100.0 × 3.0 t J5734 — 13.59 × 6.86 × 2.54 t J5743 — 12.5- 25.0 × 25.0 t ■CUSTOMIZED PRODUCTS We welcome your requests for custom FOPs with different shapes and fiber diameters, etc. Please feel free to contact us. HAMAMATSU PHOTONICS K.K. www.hamamatsu.com HAMAMATSU PHOTONICS K.K., Electron Tube Division 314-5, Shimokanzo, Iwata City, Shizuoka Pref., 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205 U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P. O. Box 6910, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218 E-mail: [email protected] Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: [email protected] France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: (33)1 69 53 71 00, Fax: (33)1 69 53 71 10 E-mail: [email protected] United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road Welwyn Garden City Hertfordshire AL7 1BW, United Kingdom, Telephone: 44-(0)1707-294888, Fax: 44(0)1707-325777 E-mail: [email protected] North Europe: Hamamatsu Photonics Norden AB: Thorshamnsgatan 35 SE-164 40 Kista, Sweden, Telephone: (46)8-509-031-00, Fax: (46)8-509-031-01 E-mail: [email protected] Italy: Hamamatsu Photonics Italia: S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)02-935 81 733, Fax: (39)02-935 81 741 E-mail: [email protected] TMCP1040E01 China: Hamamatsu Photonics (China) Co., Ltd.: 1201 Tower B, Jiaming Center, 27 Dongsanhuan Road North, Chaoyang District, Beijing 100020, China, Telephone: (86)10-6586-6006, Fax: (86)10-6586-2866 E-mail: [email protected] MAY 2013 IP