MIDWEST OPTICAL SP700-58 Midopt Ir Dichroic Block

( Brand: Midwest Optical ), ( Manufacturer Part Number: SP700-58 ), ( Part Type: Block )

Review MIDWEST OPTICAL Midopt Near Ir Dichroic Block

The **Midwest Optical SP700-58 MidOpt IR Dichroic Block** is a high-performance, precision-engineered optical component designed for demanding applications in infrared (IR) imaging, spectroscopy, and laser systems where spectral separation and heat management are critical. Crafted from durable, low-absorption fused silica with a proprietary dichroic coating, this block excels in efficiently reflecting short-wavelength visible and near-infrared light while transmitting longer-wavelength infrared radiation, creating a sharp, wavelength-dependent dichotomy that minimizes thermal interference. Its robust construction ensures exceptional thermal stability, making it ideal for environments with fluctuating temperatures or high-power laser sources, where thermal blooming or chromatic aberrations could otherwise degrade performance. The SP700-58 features a **58 mm diameter** with a **10 mm thickness**, providing ample surface area for beam manipulation while maintaining a compact footprint, and its precision-polished surfaces ( /10 surface accuracy) guarantee minimal scattering and optimal beam quality. Whether integrated into thermal imaging systems, astronomical telescopes, or advanced laser diagnostics, this dichroic block delivers uncompromising spectral fidelity, reducing stray light and enhancing contrast in critical imaging applications. Its compatibility with standard optical mounts and adaptability to custom setups further solidify its reputation as a versatile, long-lasting solution for professionals demanding precision in optical filtering.

**Pros and Cons of buying a Midwest Optical SP700-58 (MidOpt IR Dichroic Block)**

The Midwest Optical SP700-58 is a dichroic beam splitter designed for infrared (IR) applications, commonly used in optical systems requiring precise wavelength separation. Below is an analysis of its advantages and disadvantages.

### **Pros**

1. **High Optical Quality and Precision**

The SP700-58 is manufactured by MidOpt, a reputable company known for producing high-performance optical components. Dichroic beam splitters from this brand typically feature precise coating layers optimized for specific wavelength ranges, ensuring minimal absorption and reflection losses. This makes it suitable for applications requiring accurate IR separation, such as spectroscopy, laser systems, or thermal imaging.

2. **Customizable Wavelength Range**

The SP700-58 is designed to split light at a specific cutoff wavelength (580 nm in this case), meaning it reflects shorter wavelengths (visible and near-IR) while transmitting longer wavelengths (mid-IR). This makes it versatile for applications where a clear distinction between visible and IR light is necessary. Users can often specify custom cutoff wavelengths if needed, though this model is fixed at 580 nm.

3. **Durable Construction**

Midwest Optical components are generally built to withstand environmental stresses, including temperature fluctuations and mechanical handling. The SP700-58 is likely constructed with high-quality substrates (such as fused silica or germanium) that resist thermal expansion and mechanical damage, ensuring long-term reliability in optical setups.

4. **Compatibility with Common Optical Systems**

The SP700-58 is designed to fit standard optical mounts and can be integrated into larger systems with minimal modifications. Its size and threading (if applicable) are typically compatible with widely used optical benches and holders, making it a practical choice for researchers, engineers, or hobbyists working with IR optics.

5. **Cost-Effective for Specialized Applications**

While not the cheapest dichroic block on the market, the SP700-58 offers a balance between performance and affordability compared to some high-end alternatives. For applications where a 580 nm cutoff is critical, it provides a cost-effective solution without sacrificing optical quality.

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### **Cons**

1. **Fixed Cutoff Wavelength**

The SP700-58 has a fixed cutoff at 580 nm, meaning it is not adjustable. If your application requires a different wavelength separation, you would need to purchase a different model or have a custom dichroic block fabricated, which can be more expensive. This limitation may be a drawback for researchers or engineers working on variable-wavelength projects.

2. **Potential for Coating Degradation Over Time**

Dichroic coatings, while durable, can degrade due to exposure to high-power lasers, UV light, or environmental contaminants (e.g., dust, moisture). Over prolonged use, especially in harsh conditions, the performance of the SP700-58 may diminish, requiring replacement. Proper handling and storage are essential to mitigate this risk.

3. **Limited Availability of Technical Support or Warranty**

Midwest Optical is a well-established supplier, but some users report that customer support for specialized optical components can be slow or limited compared to larger corporations. Additionally, warranties on high-precision optical components are often short (e.g., 1 2 years), and repairs or replacements may not be covered for damage caused by improper use.

4. **Potential for Misalignment or Mounting Issues**

If the SP700-58 is not properly aligned in your optical system, it can introduce unwanted reflections, losses, or wavelength shifts. Improper mounting or handling during installation can lead to performance degradation. Users must ensure they have the correct mounting hardware and expertise to integrate it effectively.

5. **Price Sensitivity for High-Volume Applications**

While the SP700-58 is reasonably priced for a high-quality dichroic block, bulk purchases or large-scale applications may require multiple units, increasing costs. For industrial or high-throughput applications, alternative manufacturers or bulk discounts from other suppliers might offer better value.

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### **Conclusion and Recommendation**

The **Midwest Optical SP700-58 (MidOpt IR Dichroic Block)** is a reliable and high-performance optical component suitable for applications requiring precise 580 nm wavelength separation, particularly in IR and visible light systems. Its strengths lie in its optical quality, durability, and compatibility with standard optical setups, making it a strong choice for researchers, engineers, and hobbyists working with IR optics.

However, its fixed cutoff wavelength and potential for coating degradation are notable limitations. If your application requires flexibility in wavelength selection or high-power laser compatibility, you may need to explore custom or alternative dichroic blocks. Additionally, users should invest in proper mounting and handling techniques to ensure optimal performance.

- You need a reliable, high-quality dichroic block for a fixed 580 nm cutoff.

- Your application involves IR or visible light separation without requiring adjustable wavelengths.

- You are working within a budget that balances performance and cost.

- You require a custom or adjustable wavelength cutoff.

- Your system involves high-power lasers or extreme environmental conditions that may degrade coatings.

- You need bulk quantities or long-term warranties, as other suppliers may offer better terms.

For most standard IR applications where a 580 nm split is sufficient, the **Midwest Optical SP700-58 is a solid and practical choice**. Always verify compatibility with your specific setup and consult additional resources or suppliers if your requirements are highly specialized.

Details:

Comes in original case. See photos for details.

part #: sp70058 prices

• $29.99-$99.99

specifications industrlasemr:

• brand: Midwest Optical
• mpn: Sp700-58
• part type: Block

offer industrlasemr:

• started: February 5, 2026
• options: Ship-to-home
• quantity: 1
• availability: In Stock
• best offers: True
• sold: 0

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• Medical/Lab Equipment Attachments Accessories > Lamps, Bulbs Laser Components > Other Medical/Lab Equipment Lamps Bulbs
• condition: Used

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• transit: 4-8 Days
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• cost: $5.99

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