OHP Fresnel Lens for Overhead Projector

Model NO.: FRL283175
Focal Length: 175mm
Thickness: 2mm
Groove Pitch: 0.4mm
Light Transmittance: 90%
Customization: Yes
OEM: Yes
Transport Package: Standard Export Carton
Specification: SGS
Origin: Jiangsu, China
HS Code: 39269090
Model NO.: FRL283175
Focal Length: 175mm
Thickness: 2mm
Groove Pitch: 0.4mm
Light Transmittance: 90%
Customization: Yes
OEM: Yes
Transport Package: Standard Export Carton
Specification: SGS
Origin: Jiangsu, China
HS Code: 39269090
What is Fresnel Lens:
The Fresnel lens was invented by French physicist Augustine Fresnel, the Augustin Fresnel first used this lens design to build a glass Fresnel lens - lighthouse lens in 1822.
 
The Fresnel lens is a thin, flat optical lens which consists of a series of small narrow concentric grooves on the surface of a lightweight plastic sheet in order to reduce the thickness, weight and cost. Each groove is at a slightly different angle than the next and with the same focal length in order to focus the light toward a central focal point. Every groove can be considered as an individual small lens to bend parallel Fresnel light waves and focus the light. The lens actually eliminates some spherical aberration.
 
The Fresnel lens is a special optical lens. It can now be made from plastic such as acrylic fresnel lens, PMMA, polyvinyl cholride (PVC), polycarbonate (PC) and HDPE. A traditional glass convex lens would be thick, heavy and very expensive, but a plastic Fresnel lens is a thin, flat, lightweight and low cost alternative.
 
A high groove density has a better quality projection image. The Fresnel lens is a good solution for quality image and efficiency at a significantly lower cost. The Fresnel lens is usually corrected for spherical aberration. 
 
Application of Fresnel Lens:
The applications for Fresnel lenses include lighting, fresnel lamp, lighthouse, overhead projector, projector accessories, fresnel magnifier, reading magnifier, TV projection, condenser system, camera spotlight, automobile headlight, solar energy, solar concentrator, solar photovoltaic, screen, rear projection screen, passive motion detector, traffic sign, collimator, flight simulator, optical landing system, LED magnifier, LED photometric, LGP(light guide plate), PIR lens, stage light, virtual reality head mount display, Oculus Rift, bank ATM, car back window, etc.
 
Types of Fresnel Lenses:
Types of Fresnel lens: positive Fresnel lens, negative Fresnel lens, Fresnel lens array, cylindrical Fresnel lens, circular Fresnel lens, linear Fresnel lens, lenticular Fresnel lens, diffraction Fresnel, Fresnel reflection, Fresnel beamsplitter and Fresnel prism. 
 
Advantages of Fresnel Lens:
The Fresnel lense can be designed and manufactured in very large sizes with light weight due to less than 4mm thickness, so the cost will be lower than traditional magnifiers. In contrast, a conventional glass lens would be 200mm thick at the edge, weigh over 50kgs and cost thousand of dollars.
 
Significantly reduced lens thickness results in a substantial savings in material cost. Fresnel lenses can reduce weight, which reduces mounting and assembly cost. Extremely giant Fresnel lens up to 1000mm can be used to replace a very expensive conventional mirror assemblies in large optical systems.
 
Design of Fresnel Lens:
To determine the optical Fresnel lens design equation, all of the parameters are determined for each individual application. Several Fresnel zone formulas are used in Fresnel technologies for precision diamond tooling machines and electroforming and molding processes. 

Drawing:
OHP Fresnel Lens for Overhead Projector
OHP Fresnel Lens for Overhead Projector
 

OHP Fresnel Lens for Overhead Projector
 
Part No. Material Size (mm) Effective(mm) Focal Length (mm) Thickness (mm) Groove Pitch (mm)
FRL021150 PMMA Φ21   15 1.5 0.3
FRL028150 PMMA Φ28   15 2 0.4
FRL3030 PMMA Φ30   30 2 0.3
FRL3818 PMMA Φ38   18 2 0.3
FRL5672 PMMA Φ38   21 2 0.3
FRL4426 PMMA Φ44.8   26.5 1.2 0.2
FRL5028 PMMA Φ50   28 2  
FRL5040 PMMA Φ50   40 2  
FRL5043 PMMA Φ50   43 2 0.5
FRL5235 PMMA Φ52   35 2  
FRL5362 PMMA Φ53   62 2 0.5
FRL5672 PMMA Φ56.4   72 2 0.3
FRL6490 PMMA 64*125   90 2 0.5
FRL8050 PMMA Φ80   50 2 0.5
FRL8070 PMMA Φ80   70 2 0.5
FRL80120 PMMA 80*54   120 1 0.5
FRL84150 PMMA 84*57   150 2 0.35
FRL86406 PMMA 86*54   406 1.5 0.25
FRL88135 PMMA Φ88   135 2 0.3
FRL9050 PMMA Φ90.5   50 2  
FRL10043 PMMA Φ100   43 2  
FRL10068 PMMA Φ100   68 2 0.125
FRL10090 PMMA 100*100   90 2  
FRL100120 PMMA Φ100   120 2 0.5
FRL11060 PMMA Φ110   60 2  
FRL120100 PMMA 120*120   100 2  
FRL13050 PMMA Φ130   50 2  
FRL15070 PMMA Φ150   70 2 0.3
FRL150185 PMMA 150*90   185 2 0.3
FRL150190 PMMA 150*150   190 2  
FRL160205 PMMA Φ160   205 2  
FRL163120 PMMA 163*107   120 2 0.3
FRL170150 PMMA Φ170   150 2  
FRL18080 PMMA Φ180   80 2  
FRL198140 PMMA Φ198   140 2 0.5
FRL200100 PMMA Φ200   100 2  
FRL200120 PMMA Φ200   120 2 0.5
FRL200140-1 PMMA Φ200   140 2  
FRL200140-2 PMMA 200*200   140 2  
FRL200200 PMMA Φ200   200 2 0.5
FRL200170 PMMA 200*170   170 2 0.3
FRL200260 PMMA Φ200   680 2 0.5
FRL201250 PMMA 201*201 195*195 250 4 1
FRL205120 PMMA Φ205   120 2 0.5
FRL220130 PMMA Φ220   130 2  
FRL220240 PMMA Φ220   240 2  
FRL220600 PMMA Φ220   600 1  
FRL235182 PMMA 235*235 235*235 182 3 0.5
FRL238248 PMMA 238*238 230*230 248 4 1
FRL238300 PMMA 238*238 230*230 300 3.5 0.5
FRL240128 PMMA 240*180   128.3(f1:330 f2:210) 4 0.5
FRL25090 PMMA Φ250   90 2  
FRL250120 PMMA Φ250   120 2  
FRL250180 PMMA Φ250   180 2  
FRL250235 PMMA Φ250   235 3 0.5
FRL250290 PMMA Φ250   290 2  
FRL250370 PMMA Φ250   370 3 0.5
FRL260370 PMMA 260*260   370 2  
FRL268250-1 PMMA 268*249 252*249 250 3.75 1
FRL268265-1 PMMA 268*249 252*249 265 3.75 1
FRL268250-2 PMMA 268*256 252*248 250 3.75 1
FRL268265-2 PMMA 268*257 252*249 265 3.75 1
FRL268265-3 PMMA 268*265 252*249 265 3.75 1
FRL268100 PMMA Φ268.5   100 2.2 0.5
FRL270250 PMMA 270*250 250*250 250 3 1
FRL270254 PMMA 270*254 250*250 250 3 1
FRL270310 PMMA 270*270   310 2  
FRL277406 PMMA 277*212   406 2 0.5
FRL280128 PMMA 280*280   128.3(f1:330 f2:210) 4 0.5
FRL280145 PMMA 280*280 280*280 145 2 0.4
FRL280220-2 PMMA 280*280 280*280 220 2 0.5
FRL280220-4 PMMA 280*280 280*280 220 4 0.5
FRL280330 PMMA 280*280 280*280 330 4 0.5
FRL280400 PMMA Φ280   400 2  
FRL280410 PMMA Φ280   410 2  
FRL283175 PMMA 283*283 283*283 175 2 0.4
FRL292375 PMMA 292*292 285*285 375 3 0.4
FRL298145 PMMA 298*298 285*285 145 2 0.5
FRL300260 PMMA Φ300   260 2  
FRL300310 PMMA 300*300   310 2  
FRL300220 PMMA Φ300   220 2  
FRL300300 PMMA 300*300   300 3  
FRL300406 PMMA 300*250   406 2 0.5
FRL3002000 PMMA 300*300   2000 3  
FRL305365 PMMA 305*305 298*298 365/365 4 0.4
FRL305368-1 PMMA 305*305 266*266 368/368 4 0.5
FRL305368-2 PMMA 305*305 285*285 368/368 4 0.5
FRL310132 PMMA 310*310   132(f1:330 f2:220) 4 0.4
FRL310182 PMMA 310*310 302*302 182/406 3.8 0.5
FRL310214 PMMA 310*310 300*300 214/326 4 0.5
FRL310220 PMMA 310*310   220 2 0.5
FRL310330 PMMA 310*310   330 2 0.5
FRL310350 PMMA 310*310 300*300 350 5 1
FRL318220 PMMA 318*250   220 2 0.5
FRL318317 PMMA 318*250   317 2 0.5
FRL330350 PMMA 330*330   350 3  
FRL340350 PMMA 340*236   598 4 0.3
FRL340350 PMMA 340*340 330*330 350 5 1
FRL345350 PMMA 345*345   350 5  
FRL350350 PMMA 350*336 330*330 350 5 1
FRL350370 PMMA 350*350   370 3  
FRL358350 PMMA 358*350 330*330 350 5 1
FRL372800 PMMA 372*282   800 2 0.2
FRL3721150 PMMA 372*280   1150 2 0.2
FRL380450 PMMA Φ380   450 2  
FRL385800 PMMA 385*315   800 2 0.5
FRL395550 PMMA 395*320   550 2 0.3
FRL395220 PMMA 395*395   220 2 0.5
FRL395330 PMMA 395*395   330 2 0.5
FRL400120 PMMA 400*200   120 2 0.5
FRL400330 PMMA 400*320   330 2 0.2
FRL400500 PMMA 400*320   500 2 0.3
FRL400650 PMMA 400*320   650 2 0.6
FRL420480 PMMA Φ420   480 3 0.8
FRL420220 PMMA 420*420   220 2 0.3
FRL420330 PMMA 420*420   330 2 0.3
FRL420520 PMMA 420*260   520 4 0.3
FRL430900 PMMA 430*380   900 2 0.3
FRL431630 PMMA 431*401   630 2 0.5
FRL488120 PMMA 488*488   120 3 0.5
FRL490540 PMMA Φ490   540 3 0.8
FRL500200  PMMA 500*220   200 4 0.3
FRL520620 PMMA 520*520   620 3 0.8
FRL1000880 PMMA 1000*1000   880 3 0.5
FRL11001100 PMMA 1100*1100   1100 5  
FRL11001300 PMMA 1100*1100   1300 5 0.5
FRL1212150 PMMA 1212*13 195*19 150 3.5 1
FRL1212150 PMMA 1328*747 1328*747 1100 2 0.14
What is Fresnel Lens:
The Fresnel lens was invented by French physicist Augustine Fresnel, the Augustin Fresnel first used this lens design to build a glass Fresnel lens - lighthouse lens in 1822.
 
The Fresnel lens is a thin, flat optical lens which consists of a series of small narrow concentric grooves on the surface of a lightweight plastic sheet in order to reduce the thickness, weight and cost. Each groove is at a slightly different angle than the next and with the same focal length in order to focus the light toward a central focal point. Every groove can be considered as an individual small lens to bend parallel Fresnel light waves and focus the light. The lens actually eliminates some spherical aberration.
 
The Fresnel lens is a special optical lens. It can now be made from plastic such as acrylic fresnel lens, PMMA, polyvinyl cholride (PVC), polycarbonate (PC) and HDPE. A traditional glass convex lens would be thick, heavy and very expensive, but a plastic Fresnel lens is a thin, flat, lightweight and low cost alternative.
 
A high groove density has a better quality projection image. The Fresnel lens is a good solution for quality image and efficiency at a significantly lower cost. The Fresnel lens is usually corrected for spherical aberration. 
 
Application of Fresnel Lens:
The applications for Fresnel lenses include lighting, fresnel lamp, lighthouse, overhead projector, projector accessories, fresnel magnifier, reading magnifier, TV projection, condenser system, camera spotlight, automobile headlight, solar energy, solar concentrator, solar photovoltaic, screen, rear projection screen, passive motion detector, traffic sign, collimator, flight simulator, optical landing system, LED magnifier, LED photometric, LGP(light guide plate), PIR lens, stage light, virtual reality head mount display, Oculus Rift, bank ATM, car back window, etc.
 
Types of Fresnel Lenses:
Types of Fresnel lens: positive Fresnel lens, negative Fresnel lens, Fresnel lens array, cylindrical Fresnel lens, circular Fresnel lens, linear Fresnel lens, lenticular Fresnel lens, diffraction Fresnel, Fresnel reflection, Fresnel beamsplitter and Fresnel prism. 
 
Advantages of Fresnel Lens:
The Fresnel lense can be designed and manufactured in very large sizes with light weight due to less than 4mm thickness, so the cost will be lower than traditional magnifiers. In contrast, a conventional glass lens would be 200mm thick at the edge, weigh over 50kgs and cost thousand of dollars.
 
Significantly reduced lens thickness results in a substantial savings in material cost. Fresnel lenses can reduce weight, which reduces mounting and assembly cost. Extremely giant Fresnel lens up to 1000mm can be used to replace a very expensive conventional mirror assemblies in large optical systems.
 
Design of Fresnel Lens:
To determine the optical Fresnel lens design equation, all of the parameters are determined for each individual application. Several Fresnel zone formulas are used in Fresnel technologies for precision diamond tooling machines and electroforming and molding processes. 

Drawing:
OHP Fresnel Lens for Overhead Projector
OHP Fresnel Lens for Overhead Projector
 

OHP Fresnel Lens for Overhead Projector
 
Part No. Material Size (mm) Effective(mm) Focal Length (mm) Thickness (mm) Groove Pitch (mm)
FRL021150 PMMA Φ21   15 1.5 0.3
FRL028150 PMMA Φ28   15 2 0.4
FRL3030 PMMA Φ30   30 2 0.3
FRL3818 PMMA Φ38   18 2 0.3
FRL5672 PMMA Φ38   21 2 0.3
FRL4426 PMMA Φ44.8   26.5 1.2 0.2
FRL5028 PMMA Φ50   28 2  
FRL5040 PMMA Φ50   40 2  
FRL5043 PMMA Φ50   43 2 0.5
FRL5235 PMMA Φ52   35 2  
FRL5362 PMMA Φ53   62 2 0.5
FRL5672 PMMA Φ56.4   72 2 0.3
FRL6490 PMMA 64*125   90 2 0.5
FRL8050 PMMA Φ80   50 2 0.5
FRL8070 PMMA Φ80   70 2 0.5
FRL80120 PMMA 80*54   120 1 0.5
FRL84150 PMMA 84*57   150 2 0.35
FRL86406 PMMA 86*54   406 1.5 0.25
FRL88135 PMMA Φ88   135 2 0.3
FRL9050 PMMA Φ90.5   50 2  
FRL10043 PMMA Φ100   43 2  
FRL10068 PMMA Φ100   68 2 0.125
FRL10090 PMMA 100*100   90 2  
FRL100120 PMMA Φ100   120 2 0.5
FRL11060 PMMA Φ110   60 2  
FRL120100 PMMA 120*120   100 2  
FRL13050 PMMA Φ130   50 2  
FRL15070 PMMA Φ150   70 2 0.3
FRL150185 PMMA 150*90   185 2 0.3
FRL150190 PMMA 150*150   190 2  
FRL160205 PMMA Φ160   205 2  
FRL163120 PMMA 163*107   120 2 0.3
FRL170150 PMMA Φ170   150 2  
FRL18080 PMMA Φ180   80 2  
FRL198140 PMMA Φ198   140 2 0.5
FRL200100 PMMA Φ200   100 2  
FRL200120 PMMA Φ200   120 2 0.5
FRL200140-1 PMMA Φ200   140 2  
FRL200140-2 PMMA 200*200   140 2  
FRL200200 PMMA Φ200   200 2 0.5
FRL200170 PMMA 200*170   170 2 0.3
FRL200260 PMMA Φ200   680 2 0.5
FRL201250 PMMA 201*201 195*195 250 4 1
FRL205120 PMMA Φ205   120 2 0.5
FRL220130 PMMA Φ220   130 2  
FRL220240 PMMA Φ220   240 2  
FRL220600 PMMA Φ220   600 1  
FRL235182 PMMA 235*235 235*235 182 3 0.5
FRL238248 PMMA 238*238 230*230 248 4 1
FRL238300 PMMA 238*238 230*230 300 3.5 0.5
FRL240128 PMMA 240*180   128.3(f1:330 f2:210) 4 0.5
FRL25090 PMMA Φ250   90 2  
FRL250120 PMMA Φ250   120 2  
FRL250180 PMMA Φ250   180 2  
FRL250235 PMMA Φ250   235 3 0.5
FRL250290 PMMA Φ250   290 2  
FRL250370 PMMA Φ250   370 3 0.5
FRL260370 PMMA 260*260   370 2  
FRL268250-1 PMMA 268*249 252*249 250 3.75 1
FRL268265-1 PMMA 268*249 252*249 265 3.75 1
FRL268250-2 PMMA 268*256 252*248 250 3.75 1
FRL268265-2 PMMA 268*257 252*249 265 3.75 1
FRL268265-3 PMMA 268*265 252*249 265 3.75 1
FRL268100 PMMA Φ268.5   100 2.2 0.5
FRL270250 PMMA 270*250 250*250 250 3 1
FRL270254 PMMA 270*254 250*250 250 3 1
FRL270310 PMMA 270*270   310 2  
FRL277406 PMMA 277*212   406 2 0.5
FRL280128 PMMA 280*280   128.3(f1:330 f2:210) 4 0.5
FRL280145 PMMA 280*280 280*280 145 2 0.4
FRL280220-2 PMMA 280*280 280*280 220 2 0.5
FRL280220-4 PMMA 280*280 280*280 220 4 0.5
FRL280330 PMMA 280*280 280*280 330 4 0.5
FRL280400 PMMA Φ280   400 2  
FRL280410 PMMA Φ280   410 2  
FRL283175 PMMA 283*283 283*283 175 2 0.4
FRL292375 PMMA 292*292 285*285 375 3 0.4
FRL298145 PMMA 298*298 285*285 145 2 0.5
FRL300260 PMMA Φ300   260 2  
FRL300310 PMMA 300*300   310 2  
FRL300220 PMMA Φ300   220 2  
FRL300300 PMMA 300*300   300 3  
FRL300406 PMMA 300*250   406 2 0.5
FRL3002000 PMMA 300*300   2000 3  
FRL305365 PMMA 305*305 298*298 365/365 4 0.4
FRL305368-1 PMMA 305*305 266*266 368/368 4 0.5
FRL305368-2 PMMA 305*305 285*285 368/368 4 0.5
FRL310132 PMMA 310*310   132(f1:330 f2:220) 4 0.4
FRL310182 PMMA 310*310 302*302 182/406 3.8 0.5
FRL310214 PMMA 310*310 300*300 214/326 4 0.5
FRL310220 PMMA 310*310   220 2 0.5
FRL310330 PMMA 310*310   330 2 0.5
FRL310350 PMMA 310*310 300*300 350 5 1
FRL318220 PMMA 318*250   220 2 0.5
FRL318317 PMMA 318*250   317 2 0.5
FRL330350 PMMA 330*330   350 3  
FRL340350 PMMA 340*236   598 4 0.3
FRL340350 PMMA 340*340 330*330 350 5 1
FRL345350 PMMA 345*345   350 5  
FRL350350 PMMA 350*336 330*330 350 5 1
FRL350370 PMMA 350*350   370 3  
FRL358350 PMMA 358*350 330*330 350 5 1
FRL372800 PMMA 372*282   800 2 0.2
FRL3721150 PMMA 372*280   1150 2 0.2
FRL380450 PMMA Φ380   450 2  
FRL385800 PMMA 385*315   800 2 0.5
FRL395550 PMMA 395*320   550 2 0.3
FRL395220 PMMA 395*395   220 2 0.5
FRL395330 PMMA 395*395   330 2 0.5
FRL400120 PMMA 400*200   120 2 0.5
FRL400330 PMMA 400*320   330 2 0.2
FRL400500 PMMA 400*320   500 2 0.3
FRL400650 PMMA 400*320   650 2 0.6
FRL420480 PMMA Φ420   480 3 0.8
FRL420220 PMMA 420*420   220 2 0.3
FRL420330 PMMA 420*420   330 2 0.3
FRL420520 PMMA 420*260   520 4 0.3
FRL430900 PMMA 430*380   900 2 0.3
FRL431630 PMMA 431*401   630 2 0.5
FRL488120 PMMA 488*488   120 3 0.5
FRL490540 PMMA Φ490   540 3 0.8
FRL500200  PMMA 500*220   200 4 0.3
FRL520620 PMMA 520*520   620 3 0.8
FRL1000880 PMMA 1000*1000   880 3 0.5
FRL11001100 PMMA 1100*1100   1100 5  
FRL11001300 PMMA 1100*1100   1300 5 0.5
FRL1212150 PMMA 1212*13 195*19 150 3.5 1
FRL1212150 PMMA 1328*747 1328*747 1100 2 0.14

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