Safetyscan manual
Contents
1. 22 76 26 101 29 126 32 151 35 176 38 5 0 3 diopter 32 20 63 18 94 17 125 15 156 13 187 11 218 09 6 2 4 diopter 38 42 75 59 112 76 149 93 187 09 224 26 261 43 7 5 5 diopter 44 77 88 25 131 74 175 23 218 72 262 21 305 70 8 7 6 diopter 51 18 101 08 150 97 200 87 250 76 300 66 350 55 10 0 SafetyScanLens 7 Installing the lens on a projector The SafetyScan lens is mounted directly to the front of a laser projector Ideally a lens mount should be used which provides three degrees of adjustment Each degrees of adjustment is described below The first degree of adjustment is obvious up down You adjust the lens upward and downward until the beam is diverged primarily in the audience area but where the beam is not diverged above the heads of the audience members The second degree of adjustment is left right You will notice that that in addition to affecting the beam divergence the lens will also effectively steer the beam leftward or rightward if the center of the lens is not placed precisely over the center of the X Y scanners For best results project a test pattern that has a vertical center line such as the Pangolin Orientation test pattern Move the lens leftward and rightward so that the center line of the test pattern is not affected remains vertical and centered throughout the projected image The third degree of adjustment is tilting the lens about the split at the top If the top portion of the lens is at an angle with respect2. 27 20 27 25 26 30 26 35 26 1 0 1 diopter 8 04 15 43 22 82 30 21 37 61 45 00 52 39 1 5 2diopter 11 64 22 53 33 42 44 32 55 21 66 10 76 99 2 2 3diopter 15 52 30 24 44 97 59 70 74 43 89 16 103 89 3 0 4 diopter 19 50 38 20 56 89 75 59 94 28 112 98 131 68 3 8 5 diopter 23 54 46 26 68 99 91 72 114 44 137 17 159 90 4 6 6 diopter 27 61 54 40 81 19 107 98 134 77 161 56 188 35 5 4 Laser beam with 2 0 milliradian full angle divergence and M of 1 2 Spot size at the exit aperture of the projector 0 64 mm 5 meters 10 meters 15 meters 20 meters 25 meters 30 meters 35 meters Divergence No lens 10 51 20 51 30 50 40 50 50 51 60 51 70 51 2 0 1 diopter 13 22 25 87 38 52 51 18 63 84 76 49 89 15 2 6 2 diopter 16 10 31 61 47 12 62 63 78 15 93 66 109 17 3 1 3 diopter 19 08 37 55 56 03 74 51 92 98 111 46 129 94 3 7 4 diopter 22 12 43 62 65 12 86 63 108 13 129 64 151 14 4 3 5 diopter 25 19 49 76 74 33 98 91 123 48 148 05 172 62 4 9 6 diopter 28 29 55 96 83 62 111 29 138 96 166 62 194 29 5 6 Laser beam with 3 0 milliradian full angle divergence and M of 1 2 Spot size at the exit aperture of the projector 0 79 mm 5 meters 10 meters 15 meters 20 meters 25 meters 30 meters 35 meters Divergence No lens 15 75 30 75 45 75 60 75 75 76 90 76 105 76 3 0 1 diopter 19 57 38 36 57 16 75 96 94 75 113 55 132 35 3 8 2 diopter 23 43 46 09 68 74 91 40 114 05 136 71 159 36 4 6 3 diopter 27 33 53 88 80 42 106 97 133 52 160 06 186 61 5 3 4 diopter 31 25 61 71 92 17 122
3. 30 52 40 52 50 51 60 51 70 51 2 0 1 diopter 14 29 27 72 41 16 54 59 68 03 81 47 94 91 2 7 2 diopter 18 93 36 88 54 84 72 80 90 76 108 71 126 67 3 6 3 diopter 23 95 46 87 69 80 92 73 115 65 138 58 161 51 4 6 4 diopter 29 16 57 26 85 37 113 48 141 58 169 69 197 8 5 7 5 diopter 34 47 67 87 101 27 134 67 168 07 201 47 234 87 6 7 6 diopter 39 84 78 60 117 36 156 12 194 88 233 64 272 40 7 8 Laser beam with 3 0 milliradian full angle divergence and M of 3 Spot size at the exit aperture of the projector 1 00 mm 5 meters 10 meters 15 meters 20 meters 25 meters 30 meters 35 meters Divergence No lens 15 76 30 76 45 76 60 76 75 76 90 76 105 76 3 0 1 diopter 19 90 38 93 57 97 77 01 96 04 115 08 134 12 3 8 2 diopter 24 35 47 80 71 24 94 68 118 13 141 57 165 02 4 7 3 diopter 28 98 57 03 85 08 113 12 141 17 169 22 197 26 5 6 4 diopter 33 72 66 48 99 24 132 00 164 77 197 53 230 29 6 6 5 diopter 38 51 76 06 113 61 151 16 188 71 226 26 263 81 7 5 6 diopter 43 35 85 74 128 12 170 50 212 89 255 27 297 65 8 5 SafetyScanLens Lasers with M of 5 0 Lasers with M around 5 0 may include DPSS lasers and perhaps direct diode lasers using multiple lasers overlaid into a single beam As with the rest of the information in this manual these tables should be used as a starting point and not as the definitive final answer Laser beam with 1 0 milliradian full angle divergence and M of 5 Spot size at the exit aperture of the projector 3 30 mm 5 mete
4. not be easy to obtain Moreover for poor quality lasers the M may change over time or the beam may be distorted by other projector optics It is recommended that you observe the spot size on the exit aperture window of the laser projector and compare this with the Spot size at the exit aperture stated below within the tables Then look at the spot size at your target distance and compare this with the spot size shown in the table for no lens These two will help to give you a sanity check of your divergence and probable M of your laser Then choose a lens that provides the desired spot size Note that Pangolin highly suggests that once the lens selection is made and the lens is in place you measure the laser beam irradiance using an energy meter to confirm that it is safe for audience scanning SafetyScanLens Lasers with Mof 1 2 When the beam quality M is close to 1 0 it represents a near perfect Gaussian beam Lasers with this kind of beam quality include lasers that use gases including Argon Krypton Helium Neon etc Coherent Optically Pumped Semiconductor Lasers also have very good beam quality with low M Some low power high quality DPSS lasers may also have M of around 1 2 Laser beam with 1 0 milliradian full angle divergence and M of 1 2 Spot size at the exit aperture of the projector 0 83 mm 5 meters 10 meters 15 meters 20 meters 25 meters 30 meters 35 meters Divergence No lens 5 31 10 28 15
5. 63 153 09 183 55 214 01 6 1 5 diopter 35 17 69 56 103 95 138 34 172 73 207 11 241 50 6 8 6 diopter 39 11 77 44 115 76 154 09 192 41 230 74 269 06 7 7 SafetyScanLens 5 Lasers with M of 3 0 Lasers with M around 3 0 may include direct diode lasers Note that diode lasers usually have divergences that differ between the horizontal and vertical axis and thus the SafetyScan lens may have a drastically different effect in the shape of the laser once in place As with the rest of the information in this manual these tables should be used as a starting point and not as the definitive final answer Laser beam with 1 0 milliradian full angle divergence and M of 3 Spot size at the exit aperture of the projector 1 99 mm 5 meters 10 meters 15 meters 20 meters 25 meters 30 meters 35 meters Divergence No lens 5 61 10 44 15 38 20 35 25 33 30 32 35 31 1 00 1 diopter 13 51 25 19 36 87 48 55 60 24 71 92 83 60 2 40 2diopter 23 06 44 18 65 31 86 43 107 55 128 67 149 80 4 30 3 diopter 32 85 63 74 94 62 125 51 156 39 187 28 218 16 6 30 4 diopter 42 72 83 46 124 19 164 93 205 67 246 41 287 15 8 20 5 diopter 52 61 103 25 153 88 204 51 255 14 305 77 356 41 10 20 6 diopter 62 53 123 07 183 62 244 16 304 70 365 25 425 79 12 20 Laser beam with 2 0 milliradian full angle divergence and M of 3 Spot size at the exit aperture of the projector 1 11 mm 5 meters 10 meters 15 meters 20 meters 25 meters 30 meters 35 meters Divergence No lens 10 55 20 53
6. PANGOLIN LASER SYSTEMS SafetyScan Lens User Manual Contents Introduction Lens selection Beam quality parameter Using the tables Use with lasers whose Mis 1 2 Use with lasers whose Mis 3 0 Use with lasers whose Mis 5 0 Installing the lens on a projector Engineering Drawing SafetyScanLens 2 Introduction Audience scanning is the most beautiful thing you can do with a laser Indeed it s what separates lasers from any other lighting effect or medium because with Audience Scanning you can involve your audience in a very intimate way The light literally reaches out and touches the audience However there are a few problems to overcome When you do audience scanning the typical way using the raw laser beam the beam is so small that the entire beam s power can go into the viewer s eye Where safety regulations are strictly enforced such as the US UK and Australia the maximum amount of un diverged laser power you can use while complying with the MPE is only 10 milliwatts Obviously this does not make a very effective show Outside these countries and where safety regulations are more relaxed or not enforced often times higher laser power is used However with high power lasers audience scanning effects can be unpleasant as they sweep past your eye This is because again the beam is so small that the entire beam s power scans across the pupil of the eye The solution is to use Pangolin s SafetyScan lenses They inc
7. rease the divergence of the laser but only within the audience area Because the beam is bigger less laser light gets shone directly into the pupils of the audience Due to the inverse square law that governs light this means that higher actual laser power can be used because since the beam is bigger not all of it will fit into the pupil of the viewer s eye The result is that higher laser power can be used and the show is much more effective The side benefit is that since the beam is bigger it also makes a much more pleasant softer audience scanning experience but only in the audience area Above the heads of the audience the laser beam is unchanged so the marbling effect seen in fog remains and the spectacle brilliance and drama of an audience scanning laser show is retained The SafetyScan lens can easily be attached directly to the front of any laser projector Aside from mounting the lens generally no other changes are needed And due to the simple binary nature of the SafetyScan lens the laser beam is either affected or it isn t the SafetyScan lens is a simple and reliable solution Once the proper SafetyScan lens is installed on a projector the result is a powerful show that is much safer for those in attendance and much more pleasant to watch In addition to the information provided below Pangolin has also produced a 40 minute video showing exactly how to mount the lens how to perform safety measurements and the re
8. rs 10 meters 15 meters 20 meters 25 meters 30 meters 35 meters Divergence No lens 6 20 10 77 15 60 20 52 25 47 30 43 35 41 1 0 1 diopter 20 79 38 38 55 98 73 58 91 18 108 78 126 39 3 6 2 diopter 37 02 70 78 104 53 138 28 172 04 205 79 239 55 6 9 3 diopter 53 42 103 56 153 69 203 83 253 96 304 10 354 23 10 1 4 diopter 69 87 136 45 203 02 269 60 336 18 402 75 469 33 13 4 5 diopter 86 34 169 38 252 42 335 47 418 51 501 55 584 59 16 7 6 diopter 102 82 202 34 301 86 401 38 500 90 600 42 699 94 20 0 Laser beam with 2 0 milliradian full angle divergence and M of 5 Spot size at the exit aperture of the projector 1 72 mm 5 meters 10 meters 15 meters 20 meters 25 meters 30 meters 35 meters Divergence No lens 10 63 20 57 30 55 40 54 50 53 60 53 70 52 2 0 1 diopter 16 33 31 27 46 23 61 19 76 16 91 12 106 09 3 0 2 diopter 23 83 46 09 68 36 90 62 112 89 135 16 157 42 4 5 3 diopter 31 89 62 15 92 41 122 67 152 92 183 18 213 44 6 0 4 diopter 40 18 78 69 117 20 155 71 194 23 232 74 271 25 7 8 5 diopter 48 58 95 56 142 36 189 25 236 14 283 03 329 92 9 5 6 diopter 57 03 112 37 167 70 223 04 278 38 333 71 389 05 11 0 Laser beam with 3 0 milliradian full angle divergence and M of 5 Spot size at the exit aperture of the projector 1 33 mm 5 meters 10 meters 15 meters 20 meters 25 meters 30 meters 35 meters Divergence No lens 15 79 30 77 45 76 60 76 75 76 90 76 105 76 3 0 1 diopter 20 58 40 11 59 64 79 18 98 71 118 25 137 78 3 9 2 diopter 26 20 51
9. sulting laser shows Please contact Pangolin if you did not receive the video along with this manual SafetyScanLens 3 Lens selection how the lens affects the beam divergence and spot size The effective divergence and thus the spot size caused by the SafetyScan lens depends on the beam divergence and the beam quality parameter M of the laser beam The better the beam quality lower values of M the less effect the SafetyScan lens has on the laser beam divergence For a detailed explanation of M see the Wikipedia article here http en wikipedia org wiki M_squared Using the tables Below you will see tables that show the spot size at distances ranging from 5 meters to 35 meters from the projector for laser beams whose full angle divergence is 1 0 mRad 2 0 mRad and 3 0 mRad having beam quality parameter M of 1 2 3 0 and 5 0 The Divergence column on the right shows the approximate effective divergence with a lens in place Note that the beam divergence and M of the laser beam work together in nonlinear ways and thus the values in the tables may seem unintuitive Also note that the tables were calculated for a green wavelength and that the lens has a greater effect for red wavelengths and lesser effect for blue wavelengths The tables should serve as a starting point for lens selection and not as a definitive final answer Many laser manufacturers do not state their beam quality parameter M and thus this may
10. to the light coming from the X Y scanners there will be a kind of ghost image which is a reflection off of the top surface of the lens The lens angle should be adjusted so that the beams for the center of the projection are directly in angular alignment with respect to the top surface of the lens Doing so will prevent the ghost image and the result will be perfect The crude picture below shows the concept Top portion table of the lens must be parallel with a beam that crosses it as shown below Otherwise you will get a ghost image projected upward or downward SafetyScanLens Engineering Drawing 1 3 4 5 6 Top View A MERE Side View Front View i Edge Thickness n Dimension A Type Dimension A mm puesowmenunmems ren DO NOT SCALE CRAWNG ma A Edge Thickness Pangolin Laser Systems Inc 1 00 2 30 w lu l es 2 00 2 50 bean saz ne 3 00 3 35 Safety Scan Lens 4 00 4 05 5 00 4 75 SA ss DWG No 6 00 5 40 CR39 A R coated Safety Scan Lens Specs 1 2 WEIGHT 6 grame SCALE SHEET 1OF 1 Due to our policy of continuous product improvement information in this manual is subject to change without notice Intellectual Property Notice SafetyScan is a trademark of Pangolin Laser Systems Inc All rights reserved There are currently two pending patents on SafetyScan lenses
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