Plano-convex lenses are used to collimate diverging light or to focus collimated light.
Plano-convex (PCX) lenses are designed for efficient light focusing and collimation in a wide range of optical systems. With one flat surface and one convex surface, they are ideal for applications where light needs to be focused from a collimated beam or point source.
Sunday Optical Plano convex lens diameter range from 0.1mm to 600mm, Material can be optical glass, Quartz, Sapphire, CaF2, MgF2, Infrared glass such as ZnSe, CaF2, Ge, Si.
Sunday Optics provides high-quality plano-convex lenses with stable performance, flexible customization, and competitive pricing.
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Parameter
| Structure | Plano convex lens |
| Material | Optical glass, UVFS, Germanium, Silicon, CaF2, MgF2, ZnSe ZnS, Sapphire |
| Diameters Available | 0.1mm to 600mm |
| Diameter Tolerance | +0.00/-0.02mm or customer design |
| Surface Quality | 10-5 |
| Surface Irregularity | λ/10 @632.8nm or customer design |
| Thickness tolerance | +0/-0.02mm |
| Clear Aperture | >90% of Diameter |
| Chamfer | 0.05-0.5mmx45degree, according to customer's needs. |
| Centeration | 3 arcmin |
| Coating | Single Mag2, Multiple Layers AR Coating A: 350-650nm B: 650-1050nm C: 1050-1585nm D: Customer Design |
BK7 Standard Plano Convex Lens
| No. | EFL(mm) | Dia.(mm) | Radius(mm) | Material | Tc(mm) | Te(mm) |
| SD1A24 | 4 | 2 | 2.073 | BK7 | 1.26 | 1.00 |
| SD1A33 | 3 | 3 | 1.55 | Bk7 | 2.20 | 1.04 |
| SD1A35 | 5 | 3 | 2.592 | BK7 | 1.48 | 1.00 |
| SD1A60 | 10 | 6 | 5.18 | BK7 | 3.00 | 2.00 |
| SD1A62 | 12 | 6 | 6.22 | BK7 | 2.77 | 2.00 |
| SD1A65 | 15 | 6 | 7.77 | BK7 | 2.61 | 2.00 |
| SD1A63 | 30 | 6 | 15.55 | BK7 | 1.77 | 1.50 |
| SD1A10B | 25.065 | 10 | 13.01 | BK7 | 4.00 | 3.00 |
| SD1A105 | 15 | 12.7 | 7.78 | BK7 | 5.30 | 2.00 |
| SD1A122 | 20 | 12.7 | 10.37 | Bk7 | 4.20 | 2.00 |
| SD1A125 | 50 | 12.7 | 25.92 | Bk7 | 2.59 | 1.80 |
| SD1A120 | 100 | 12.7 | 51.83 | BK7 | 2.20 | 1.80 |
| SD1A182 | 25 | 18 | 12.96 | Bk7 | 5.44 | 1.80 |
| SD1A183 | 30 | 18 | 15.55 | BK7 | 4.67 | 1.80 |
| SD1A185 | 50 | 18 | 25.92 | Bk7 | 3.42 | 1.80 |
| SD1A255 | 50 | 25 | 25.92 | BK7 | 5.21 | 2.00 |
| SD1A257 | 75 | 25 | 38.88 | BK7 | 4.06 | 2.00 |
| SD1A251 | 100 | 25 | 51.83 | BK7 | 3.83 | 2.00 |
| SD1A24A | 25.4 | 25.40 | 13.17 | BK7 | 11.70 | 2.00 |
| SD1A245 | 50 | 25.40 | 25.92 | BK7 | 5.30 | 2.00 |
| SD1A247 | 75 | 25.40 | 38.88 | Bk7 | 4.13 | 2.00 |
| SD1A240 | 100 | 25.40 | 51.83 | Bk7 | 3.60 | 2.00 |
| SD1A305 | 50 | 30 | 25.92 | BK7 | 7.28 | 2.50 |
| SD1A307 | 75 | 30 | 38.87 | BK7 | 5.51 | 2.50 |
| SD1A310 | 100 | 30 | 51.83 | BK7 | 4.72 | 2.50 |
| SD1A320 | 200 | 30 | 103.66 | BK7 | 3.60 | 2.50 |
| SD1A586 | 60 | 50.80 | 31.098 | BK7 | 16.15 | 3.00 |
| SD1A587 | 75 | 50.80 | 38.88 | BK7 | 12.44 | 3.00 |
| SD1A580 | 100 | 50.80 | 51.83 | BK7 | 9.65 | 3.00 |
| SD1A582 | 200 | 50.80 | 103.66 | BK7 | 6.21 | 3.00 |
| SD1A583 | 300 | 50.80 | 155.49 | BK7 | 5.09 | 3.00 |
| SD1A585 | 500 | 50.80 | 259.15 | BK7 | 4.25 | 3.00 |
| SD1A751 | 100 | 75 | 51.83 | BK7 | 19.05 | 3.00 |
| SD1A755 | 150 | 75 | 77.75 | BK7 | 12.64 | 3.00 |
| SD1A752 | 200 | 75 | 103.66 | BK7 | 10.02 | 3.00 |
What is the difference between convex lens and concave lens?
Structural Characteristics
Plano concave lens: One side of the lens is flat, while the other side is concave, and the middle part is thinner than the sides. This structure gives the flat-concave lens unique optical properties.
Plano Convex lens: One side of the lens is flat, while the other side is a convex spherical surface. This structure enables the flat convex lens to converge light rays to a single point, which is called the focal point.
Focal Characteristics
Plano concave lens: It has a negative focal length, meaning that after light passes through the lens, it will diverge. This makes flat concave lenses useful in optical systems for beam expansion, projecting light, and increasing the focal length of the optical system.
Plano convex lens: It has a positive focal length and can converge parallel light rays to a focal point, and can also transform a point light source into a collimated beam. Flat convex lenses are mainly used for monochromatic light, such as laser light. They are an ideal choice for converging parallel light or converting a point light source into parallel light
Application
Plano concave lens: Due to its ability to diverge light, flat concave lenses are commonly used in optical systems for scenarios requiring beam expansion or adjusting light, such as some optical components in projectors.
Plano convex lens: Due to its significant role in light refraction and focusing, flat convex lenses are widely used in fields such as photography, microscopes, and projectors. In photography, flat convex lenses are used to adjust the focal length, increase depth of field, and make the image clearer.
· Laser focusing systems
· Fiber optic collimation
· Optical imaging systems
· LED illumination systems
· Sensors and detection devices
· Medical and scientific instruments
FAQ – Plano-Convex Lenses
Q1: Which substrate is best for UV applications?
A1: For ultraviolet (UV) applications below 350 nm, we recommend UV fused silica lenses. They offer high transmission, low fluorescence, and excellent thermal stability.
Q2: How should I orient a plano-convex lens to minimize spherical aberration?
A2: In most focusing applications, place the curved side towards the collimated beam and the flat side towards the focus. This reduces spherical aberration and improves image quality.
Q3: What surface quality and wavefront tolerance should I choose for laser applications?
A3: For high-power or precision laser systems, we suggest 10-5 or 20-10 scratch-dig with λ/4 or better wavefront error. For general imaging or industrial applications, 40-20 is usually sufficient.
Q4: Can you provide custom diameters, focal lengths, or coatings?
A4: Yes. Sunday Optics offers OEM customization including diameter, focal length, edge thickness, surface quality, wavefront precision, and AR or laser-line coatings tailored to your application.
Q5: What coatings are available for plano-convex lenses?
A5: We offer uncoated, MgF₂, broadband VIS-NIR AR, and laser-line AR coatings (e.g., 355 nm, 532 nm, 1064 nm). Custom coatings are also available based on your wavelength or system requirements.
Q6: What are the typical applications for plano-convex lenses?
A7: Common applications include laser focusing, fiber optic collimation, optical imaging, LED illumination, sensors, and medical or scientific instruments.
Q7: What is your MOQ and lead time for bulk orders?
A8: Minimum order quantity (MOQ) depends on lens specifications and coatings. Standard stock lenses usually ship within 7–14 days. Custom or coated lenses may require longer; please contact us for precise delivery times.
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