Positive Optics

Positive Optics A good price and professional optical manufacturer with ISO9001 certificate, supplying optical lens, filter, prism, window, mirror and coating

Why do optical components from different suppliers have different prices?Many customers compare quotations and wonder:β€œW...
31/08/2026

Why do optical components from different suppliers have different prices?

Many customers compare quotations and wonder:

β€œWhy is one supplier much cheaper than another?”

The difference may come from:

πŸ”Ή Optical material
πŸ”Ή Surface quality requirements
πŸ”Ή Flatness tolerance
πŸ”Ή Component size and complexity
πŸ”Ή Optical coating
πŸ”Ή Quantity
πŸ”Ή Inspection requirements

A lower price does not always mean a better deal.

The right supplier helps you choose the correct specifications, avoid unnecessary costs, and reduce production risks.

For custom optics, understanding the requirements is just as important as manufacturing.

🌐 www.positiveoptic.com
πŸ“§ [email protected]

Looking for a Custom Optical Supplier? Ask These 7 Questions First.Don't choose an optical supplier based on price alone...
26/08/2026

Looking for a Custom Optical Supplier? Ask These 7 Questions First.

Don't choose an optical supplier based on price alone.

Before ordering custom lenses, windows, filters, mirrors, or prisms, ask:

πŸ”Ή Can you manufacture from my drawing?
πŸ”Ή Can you recommend more practical specifications?
πŸ”Ή Can you provide the right optical material?
πŸ”Ή How do you inspect quality?
πŸ”Ή Can you customize the coating?
πŸ”Ή What if my specification is difficult to manufacture?
πŸ”Ή Can you support prototypes and small quantities?

A good supplier should do more than manufacture your drawing.

They should help you understand the specifications, identify potential problems, control cost, and reduce production risk.

The cheapest quote isn't always the cheapest solution.

🌐 www.positiveoptic.com
πŸ“§ [email protected]

Do you know how to read an optical drawing?An optical component is not defined only by its shape and material.Important ...
17/08/2026

Do you know how to read an optical drawing?

An optical component is not defined only by its shape and material.

Important specifications include:

πŸ”Ή Material
πŸ”Ή Surface Quality (60-40, 40-20, 20-10)
πŸ”Ή Surface Roughness (Ra/RMS)
πŸ”Ή Flatness (Ξ»/4, Ξ»/10)
πŸ”Ή Radius of Curvature
πŸ”Ή Thickness Tolerance
πŸ”Ή Centration
πŸ”Ή Coating
πŸ”Ή Clear Aperture
πŸ”Ή Wedge

Each parameter can affect:

✨ Optical performance
✨ Assembly accuracy
✨ Manufacturing cost

The best optic is not always the most precise one.

It is the right one for your application.

🌐 www.positiveoptic.com
πŸ“§ [email protected]

11/08/2026

Do you know the difference between Surface Quality and Surface Roughness?

Many people confuse them, but they describe different things.

πŸ”Ή Surface Quality (60-40, 20-10)
β†’ Measures visible defects like scratches and digs

πŸ”Ή Surface Roughness (Ra, RMS)
β†’ Measures microscopic surface texture after polishing

Both can affect optical performance, especially in:

✨ Laser systems
✨ Precision imaging
✨ High-performance optics

Choosing the right specification is more important than simply choosing the smallest number.

🌐 www.positiveoptic.com

Why does optical coating matter?Even a high-quality optical component can lose performance without the right coating.Dif...
04/08/2026

Why does optical coating matter?

Even a high-quality optical component can lose performance without the right coating.

Different coatings have different purposes:

πŸ”Ή AR Coating
β†’ Reduce reflection and increase transmission

πŸ”Ή BBAR Coating
β†’ Maintain high transmission across a wider wavelength range

πŸ”Ή HR Coating
β†’ Maximize reflection for mirrors and laser systems

The correct coating depends on:

βœ” Wavelength
βœ” Application
βœ” Performance requirements
βœ” Operating environment

The best coating is not always the most expensive one.

It is the right one for your system.

🌐 www.positiveoptic.com

28/07/2026

Why does a small angle matter in optical components?

The answer is Wedge Error.

Even a tiny difference in thickness between two sides of an optical window or filter can affect:

πŸ”Ή Beam direction
πŸ”Ή Image alignment
πŸ”Ή Laser performance
πŸ”Ή Polarization accuracy

Wedge is especially important for:

βœ” Laser systems
βœ” Beam splitters
βœ” Precision imaging
βœ” Scientific instruments

The best optical specification is not always the tightest one.

It is the one that matches your application.

🌐 www.positiveoptic.com

Did you know that an optical component can meet every specification and still underperform?One often-overlooked reason i...
21/07/2026

Did you know that an optical component can meet every specification and still underperform?

One often-overlooked reason is **Clear Aperture**.

A clear aperture that's too small can reduce light transmission, cause beam clipping, and affect image qualityβ€”even if the material, coating, and surface quality are correct.

The key isn't choosing the largest clear aperture. It's choosing the right one for your application.

Learn more about custom optical components at:

🌐 [www.positiveoptic.com](http://www.positiveoptic.com)

Why do optical tolerances matter?A lens can have the correct material and coating, but still fail to perform if the tole...
14/07/2026

Why do optical tolerances matter?

A lens can have the correct material and coating, but still fail to perform if the tolerances are not properly defined.

Three important parameters:

πŸ“Œ Diameter tolerance β†’ ensures proper mechanical fitting

πŸ“Œ Thickness tolerance β†’ affects focal length and optical alignment

πŸ“Œ Centration β†’ keeps the optical axis correctly positioned

The best optical component is not always the one with the tightest tolerance.

It is the one with the right specification for your application.

Learn more about custom optical solutions:

🌐 www.positiveoptic.com

Choosing the right optical specification isn't about selecting the highest gradeβ€”it's about choosing the right one for y...
06/07/2026

Choosing the right optical specification isn't about selecting the highest gradeβ€”it's about choosing the right one for your application.

πŸ“Œ Surface Quality β†’ Controls light scatter
πŸ“Œ Flatness β†’ Controls wavefront accuracy
πŸ“Œ Optical Coating β†’ Maximizes transmission and minimizes reflection

Understanding the difference can help reduce costs, improve system performance, and avoid unnecessary over-specification.

Which specification do you check first when purchasing optical components?

🌐 www.positiveoptic.com

πŸ‘‰ Flatness Ξ»/4 vs Ξ»/10: What Does It Really Mean in Optical Components? πŸ‘ˆ In optical system design, surface flatness is ...
28/06/2026

πŸ‘‰ Flatness Ξ»/4 vs Ξ»/10: What Does It Really Mean in Optical Components? πŸ‘ˆ

In optical system design, surface flatness is a critical specification for windows, mirrors, and high-precision optical components. However, terms like Ξ»/4, Ξ»/8, and Ξ»/10 flatness are often misunderstood or over-specified in RFQs.

Flatness describes how closely an optical surface conforms to an ideal plane, typically measured relative to a reference wavelength (commonly a He-Ne laser at 632.8 nm).

πŸ”Ή What do these values represent?

-Ξ»/4 flatness
Suitable for most industrial and imaging systems. It provides adequate wavefront control for general optical performance at a cost-efficient level.

-Ξ»/10 flatness
Used in high-precision applications such as laser systems, interferometry, and advanced scientific instruments where tighter wavefront control is required.

As flatness specification becomes stricter, manufacturing complexity and cost increase significantly.

πŸ”Ή Why flatness matters

Surface flatness directly affects:
-Wavefront distortion
-Beam quality in laser systems
-Interference accuracy in metrology applications
-Overall imaging system performance

Even small deviations from ideal flatness can introduce measurable optical errors in high-sensitivity systems.

πŸ”Ή A common engineering misunderstanding

As highlighted in optical engineering references such as the Edmund Optics Knowledge Center, flatness should always be evaluated in the context of the full optical systemβ€”not as an isolated specification.

A common mistake in procurement is over-specifying flatness (e.g., Ξ»/10) when Ξ»/4 performance is already sufficient, resulting in unnecessary cost increase without measurable system improvement.

πŸ“Œ Engineering takeaway

Flatness selection should always be based on:
βœ” Application type (imaging, laser, interferometry)
βœ” Wavelength and wavefront sensitivity
βœ” System-level performance requirements
βœ” Cost-performance optimization

Higher specification does not automatically mean better system performanceβ€”it must be justified by the application.

At Positive Optics, we support custom optical components with application-specific flatness, surface quality, and coating control for laser, imaging, and scientific systems.

🌐 www.positiveoptic.com
πŸ“§ [email protected]

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No. 218, Yuandadajie
Changchunling
130000

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